ACT English Quiz: Style And Tone

Which choice best fits the style and tone of the passage?

In a travel memoir, the author recounts arriving in a small coastal town before dawn. The tone is vivid and quietly appreciative, using sensory details without exaggeration. Describing the first view of the harbor, the author writes that it was absolutely epic in the pale morning light.

PASSAGE I: The Golden Seam

¹ In Western cultures, a shattered ceramic bowl is usually destined for the trash. If an attempt is made to repair it, the goal is often to hide the cracks, rendering the object as close to its original, pristine state (1) as possible as it can be. However, a centuries-old Japanese art form takes the exact opposite approach. Known as kintsugi, which translates to "golden joinery," this technique does not disguise the damage. Instead, it highlights the fractures (2) with a super-expensive lacquer mixed up with gold, silver, or platinum.

² The origins of kintsugi are traced back to the late fifteenth century. According to legend, Japanese shogun Ashikaga Yoshimasa broke his favorite tea bowl and sent it to China for repairs. When the bowl was returned, it had been stitched back together with ugly metal staples. (3) Displeased with the aesthetic, the shogun challenged his local craftsmen to find a more beautiful solution. The result was kintsugi.

³ The process of kintsugi is meticulous and time-consuming. First, the artisan must gather all the broken pieces and clean them thoroughly. Next, a natural adhesive called urushi—a sap extracted from the Chinese lacquer tree(4) are carefully applied to the edges. Because urushi is highly toxic in its raw state, artisans must wear protective gear(5) during this phase of the process. The pieces are pressed back together, and the bowl is placed in a warm, humid environment to cure. This curing process can take several weeks.(6)

⁴ Once the lacquer has fully hardened, the true artistry begins. The artisan sands the seams flush with the surface of the ceramic. Then, a final layer of urushi is applied to the cracks. Before this layer dries, the artisan gently brushes the powdered gold over the sticky sap.(7) The gold adheres to the lines, transforming the chaotic web of fractures into a luminous, deliberate design.

⁵(8) Consequently, kintsugi is more than just a repair method; it is a profound philosophical statement. It reflects the Japanese concept of wabi-sabi, which is the embrace of the flawed, the impermanent, and the incomplete.(9) Rather than throwing away a broken item, kintsugi teaches that the break is simply a chapter in the object's history. By illuminating the scars with gold, the artisan celebrates the object's survival. (10) The bowl becomes more beautiful not in spite of its brokenness, but because of it.

Which choice best maintains the stylistic tone of the paragraph?

PASSAGE II: The Ghost in the Machine

¹ In 1920, a Russian physicist named Leon Theremin was conducting experiments with high-frequency oscillators when he noticed something strange. As he moved his hand near the (11) equipments circuits, the pitch of the audio signal changed. Theremin realized he had stumbled upon a completely new way to produce sound. He quickly adapted his laboratory apparatus into a musical instrument. It was officially named the aetherphone, but it soon became known simply as the theremin.

² (12) Unlike a piano, a guitar, or a flute, the theremin is played without physical contact. The instrument consists of a wooden box featuring two metal antennas: a vertical one on the right and a horizontal loop on the left. (13) The vertical antenna controls pitch, while the horizontal loop controls volume. As the player's hands move closer to or further from the antennas, they alter the electromagnetic fields surrounding them. This interference is translated into electrical signals, which are then amplified through a speaker.

³ Playing the theremin requires intense concentration and absolute physical control. Because there are no keys, frets, or strings to guide the musician, relying entirely on "muscle memory" and a flawless ear for relative pitch (14) is required. A tremor in the performer's hand, a shift in posture, or even a deep breath can unintentionally alter the pitch. (15) Many people try to play the theremin and give up after a few days.

⁴ When Leon Theremin demonstrated his invention to the public in the 1920s, audiences were mesmerized. The musician stood behind the box, waving their hands in the air like an orchestra conductor, (16) coaxing out ethereal, trembling melodies. (17) The sound was often compared, by critics, to a human voice singing a wordless, mournful tune. Classical composers began writing concertos specifically for the instrument.

⁵ Despite its initial popularity, the theremin was ultimately too difficult for the average person to master, so it never became a household instrument. (18) However, it found a second life in Hollywood. In the 1950s, film composers realized that the theremin's eerie, otherworldly wail was the perfect soundtrack for science fiction and psychological thriller movies. Whenever a flying saucer landed on screen or a character experienced a cinematic mental breakdown, the theremin was there to provide the sonic backdrop.

⁶ Today, the theremin is enjoying a modern resurgence. Contemporary artists use it to add a vintage, atmospheric layer to rock and electronic music. Though synthesizer technology has made it incredibly easy to produce identical sounds digitally, the physical magic of the theremin, (19) the act of pulling music out of thin air—remains utterly unique.

Which of the following alternatives to the underlined portion would NOT be acceptable?

"Reclaiming the Night Sky\n\nFor millennia, humans have looked up at the night sky and found inspiration in the stars. Ancient civilizations used celestial bodies to navigate the oceans, track the seasons, and creating [26] complex mythologies. Today, however, that connection is being severed. Light pollution, the excessive or misdirected artificial light produced by cities, are washing [27] out the stars for 80 percent of the world's population.\n\nThe consequences of this "luminous fog" extend far beyond the loss of a pretty view. Biologists warn that artificial light at night disrupts the circadian rhythms of wildlife. Sea turtle hatchlings, confused [28] by beachfront lighting, often wander toward highways instead of the ocean. Similarly, migrating birds are drawn off course by the glow of skyscrapers, leading to fatal collisions. The impact on human health is also concerning; exposure to bright light at night suppresses melatonin production, which has been linked to sleep disorders and other health issues. [29]\n\nSolving this problem does not mean we must plunge our cities into darkness. The solution lies in "smart lighting" strategies. By simply shielding streetlights so they cast light downward, [30] glare can be reduced significantly. Communities can also switch to LEDs with warmer color temperatures. Blue-rich white light is the most harmful to the night sky, yet it is the type most commonly used in modern streetlamps. [31] Warmer, amber-colored lights are just as effective for visibility but far less scattering in the atmosphere.\n\nSeveral cities have already proven that change is possible. Flagstaff, Arizona, and Tucson, Arizona, have enforced strict lighting ordinances to protect the work of nearby observatories. The results are clear; residents [32] can see the Milky Way from their backyards, yet the streets remain safe for drivers and pedestrians.\n\n[1] We cannot turn back the clock to a time before electricity. [2] However, we can choose to use technology more responsibly. [3] By adopting better lighting practices, we can save energy, protect wildlife, and preserve our view of the cosmos. [4] The stars have always been there, waiting for us to turn down the lights so they can return. [33] [34]"

Which choice best maintains the reflective and poetic tone of the essay's conclusion?

Which choice most effectively maintains the essay's tone?

The article explains how sleep supports memory by helping the brain consolidate new information. It cites multiple peer-reviewed studies and distinguishes correlation from causation when summarizing results. The author also notes limitations, including small sample sizes and differences in measurement methods. For readers who want to improve sleep quality, the article recommends a bunch of easy hacks such as consistent bedtimes and reduced evening screen use.

Which choice most effectively maintains the essay's tone?

During our hike along the ridge trail, the wind picked up and pushed thin clouds across the sun. I stopped often, not because I was tired, but because the view kept changing: patches of light moved over the valley like slow waves. My friend pointed out an eagle circling above the pines, and we watched in silence. In that moment, I was, like, totally at peace with how small we were.

Which choice most effectively maintains the essay's tone?

In a science newsletter for general readers, the author explains how vaccines train the immune system and notes that researchers continue to monitor effectiveness over time. The tone is accessible but respectful and avoids slang. The author writes that the immune response can kick in fast after exposure to a familiar pathogen.

Which choice most effectively maintains the essay's tone?

In her memoir, the author describes learning to cook alongside her grandmother, who measured ingredients by sight and adjusted recipes without writing anything down. The kitchen smelled of toasted cumin and warm bread, and the author admits she often felt impatient when instructions were not explicit. Still, she came to appreciate the lesson: attention matters more than perfection. Looking back, she says her grandmother's advice was straight fire whenever she doubted herself.

PASSAGE I: The First Ferris Wheel

¹ In 1889, organizers of the upcoming World's Columbian Exposition in Chicago faced a monumental (1) challenge, they wanted to construct an architectural marvel that would rival the Eiffel Tower. The Parisian tower had been the centerpiece of the 1889 World's Fair, and Chicago wanted to outdo it. Numerous architects submitted plans, but most were simply unoriginal (2) knockoffs of the Eiffel Tower. It wasn't until a thirty-three-year-old engineer named George Washington Gale Ferris Jr. pitched his (3) idea, that the organizers found their masterpiece. Ferris proposed a massive rotating wheel that would carry passengers high above the city.

² The organizers were initially skeptical. They feared the giant wheel would collapse under its own (4) weight, however, Ferris was a bridge builder who understood structural steel. He spent $25,000 of his own money on safety studies and (5) has secured financial backing from private investors. Impressed by his dedication, the exposition committee finally granted him permission to build.

³ The construction of the Ferris wheel was an unprecedented engineering feat. The wheel's axle, (6) which weighed 71 tons, was the largest piece of forged steel ever manufactured at the time. Two 140-foot steel towers supported the axle. Extending from the axle were 36 spokes, holding the massive outer rim in place. Instead of simple open-air benches, the wheel featured 36 fully enclosed wooden cars, each capable of holding 60 (8) people, as a result, a single ride could accommodate over 2,000 passengers. (7)

⁴ When the wheel officially opened to the public in June 1893, it was an instant sensation. For fifty cents, riders were lifted 264 feet into the air, offering breathtaking, panoramic views of Lake Michigan and the sprawling fairgrounds. At night, the wheel was illuminated by 3,000 incandescent light (9) bulbs, creating a brilliant, glowing halo visible from miles away.

⁵ Today, the Ferris wheel is a ubiquitous feature of amusement parks worldwide. While modern versions may be taller or feature high-tech observation cabins, they all owe their existence to Ferris's visionary design. (10)

Which choice best maintains the academic and historical tone of the essay?

"The Art of Kintsugi\n\nWhen a ceramic bowl breaks in the West, it is usually discarded. In Japan, however, a broken object is sometimes viewed as an opportunity for artistic renewal. This is the philosophy behind kintsugi ("golden joinery"), the centuries-old art of repairing broken pottery with lacquer dusted with powdered gold. Instead of hiding the fractures, the kintsugi master highlights it, [44] transforming the scars into the object's most beautiful feature.\n\nThe process is neither quick nor easy. The artisan must first piece the shards together using urushi, a natural lacquer derived from the sap of the Chinese lacquer tree. Because urushi is related to poison ivy, it can cause severe rashes if touched, so the artisan must work carefully to avoid skin contact. Once the adhesive hardens, which can take weeks, the cracks are painted with more lacquer and then sprinkled with fine gold powder. This [45] creates a striking contrast between the dark ceramic and the glowing veins of gold.\n\nThe origins of kintsugi are often traced back to the fifteenth century. Legend has it that the shogun Ashikaga Yoshimasa sent a damaged Chinese tea bowl back to China for repairs. It returned held together with ugly metal staples. Displeased by the clumsy appearance, [46] Yoshimasa ordered his craftsmen to find a more aesthetic solution. The result was a method that not only restored the bowl but also made it totally cooler than it was before. [47]\n\nKintsugi is closely related to the philosophy of wabi-sabi. [48] This worldview embraces imperfection and transience. By emphasizing the cracks, kintsugi celebrates the object's history rather than erasing it. The repaired vessel is considered more valuable than the new one because it has survived a trauma and emerged stronger. In an age of mass production and disposable goods, this ancient practice offers a reminder that breaks, and repairs, [49] are part of the beauty of existence. [50]"

Which choice best maintains the tone and style of the essay?

"The Architects of the Ocean\n\nThey are visible from space, yet they are built by creatures no larger than a teacup. Coral reefs, often called the "rainforests of the sea," are the work of tiny animals known as polyps. Each of these soft-bodied organisms are [35] related to jellyfish and anemones. Using minerals drawn from the seawater, the polyp constructs a hard, protective skeleton around its base.\n\nThis construction process, repeated by billions of polyps over thousands of years, create the massive limestone structures [36] that form a reef. The polyps do not work alone; they share a symbiotic relationship with microscopic algae called zooxanthellae. The algae live inside the polyp's tissue, providing food through photosynthesis and lending the coral its vivid pigmentation. [37] In return, the polyp offers the algae a safe home and access to sunlight.\n\nThe scale of this collaboration is staggering. The Great Barrier Reef in Australia, which stretches over 1,400 miles, [38] is the largest living structure on Earth. It is composed of nearly 3,000 individual reefs and is home to a diverse array of different species [39] of marine life. From microscopic plankton to massive humpback whales, the reef supports a complex food web. [40]\n\nDespite their size, reefs are fragile. Rising ocean temperatures can cause the polyps to expel their algal partners, a phenomenon known as bleaching. Without the algae, the coral turns white and may starve. However, [41] scientists are working to identify heat-resistant coral strains. By understanding the biology of these master builders, we hope to ensure that the "architects of the ocean" continue to thrive. [42] [43]"

Which choice best maintains the academic tone of the essay?

PASSAGE I: The Invisible Art of Noise

¹ When watching a movie, audiences usually focus on the actors' dialogue or the sweeping musical score. Rarely do they consider the crunch of footsteps in snow, the rustle of a silk dress, or the squeak of a saddle. Most viewers assume these sounds were recorded on set during filming. In reality, however, microphones are designed to pick up dialogue, not background noise. Most of the detailed sounds you hear (1) has been created weeks later in a studio by a specialized craftsperson known as a Foley artist.

² Named after Jack Foley, a sound editor at Universal Studios in the 1920s, the profession requires a unique blend of creativity and athleticism. Foley artists work on specialized stages containing recessed areas called "Foley pits." These pits hold different surfaces—gravel, dirt, hardwood, and more—that mimic real-world textures. To recreate the sound of a character walking, the artist watches the screen and mimics the actor's steps, (2) wearing the shoes that match the character's footwear. If the character is walking on broken glass, the artist steps on scattered ceramic tiles. (3) Having carefully selected the proper materials, the realistic sound is created.

³ The work involves more than just footsteps. Foley artists must be inventive to (4) generate sounds that do not exist in the real world. For a science fiction film, the sound of an alien egg hatching (5) might be created by squishing a honeydew melon. (6) On the other hand, the bone-crunching impact of a fistfight is often simulated by breaking stalks of celery or snapping carrots wrapped in a towel. The goal is realistic audio, even if the source is decidedly artificial.

⁴ Precision is critical. The sound must sync perfectly with the visual action. If a sword is drawn from a sheath one second too late, the illusion is shattered. Foley artists often perform "wild tracks," recording sounds without watching the picture, (7) but for complex scenes, they must perform in real-time, matching their movements to the actor's rhythm.

⁵ Despite their importance, Foley artists often go unrecognized. Their work is successful only when it goes unnoticed. If the audience realizes the sound of a horse's hooves is actually (8) two halves of a coconut shell being banged together, the magic is lost. Like a magician's trick, the art of Foley relies on misdirection.

⁶ Today, digital libraries offer thousands of pre-recorded sound effects. Many directors still prefer the custom touch of a human artist. A canned sound effect is static and repetitive, (9) whereas a Foley performance is organic. It breathes life into the visual image, giving weight and texture to the world on screen. (10) The next time you watch an old horror movie, remember that someone might be standing in a studio, slowly twisting an old rusty hinge.(11)

Which choice best maintains the stylistic tone of the passage?

PASSAGE III: The Architecture of Sleep

¹ Sleep is often viewed as a passive state, a time when the body shuts down to conserve energy. In reality, however, sleep is a highly active and complex biological process. While we rest, our brains are engaging in a neurological workout that is essential for physical health and mental clarity. This nightly maintenance is (23) governed by two opposing forces: the sleep drive, which builds up the longer we are awake, and the circadian rhythm, an internal "clock" that regulates our sleep-wake cycle based on light and darkness.

² Once asleep, the brain cycles through four distinct stages. The first three stages are known collectively as non-rapid eye movement (NREM) sleep. During the deepest part of NREM, (24) heart rate slows down, blood pressure drops, and the body repairs tissues. (25) Conversely, the fourth stage is rapid eye movement (REM) sleep. In this phase, brain activity spikes to levels similar to wakefulness. This is the stage where dreaming occurs and (26) memories were consolidated from short-term to long-term storage.

³ One of the most critical functions of sleep is "taking out the trash." For years, scientists wondered how the brain, (27) unlike other organs, cleared out metabolic waste products. In 2013, researchers discovered the "glymphatic system," a macroscopic waste clearance system formed by glial cells. During deep sleep, these cells shrink, increasing the space between neurons by up to 60 percent. This allows cerebrospinal fluid (28) to flow rapid through the brain tissue, flushing out toxic proteins associated with neurodegenerative diseases. (32)

⁴ (29) Neglecting this biological need has serious consequences. Sleep deprivation impairs cognitive function, weakens the immune system, and increases the risk of chronic conditions like heart disease. (30) Experts recommend adults get between seven and nine hours of sleep per night. Despite these risks, modern society often treats sleep as a luxury rather than a necessity. Artificial lighting and digital screens (31) disrupts the production of melatonin, the hormone that signals to the body that it is time to rest.

⁵ We cannot cheat our biology. Caffeine and sheer willpower can only mask the symptoms of fatigue for so long. Eventually, the "sleep debt" must be repaid. By prioritizing sleep, we are not being lazy; we are investing in our long-term health. The architecture of sleep is built on a foundation of millions of years of evolution, and (33) it remains the most effective medicine we have. (34)

Which choice most effectively maintains the formal, scientific tone of the passage?

PASSAGE IV: The Violin Doctor

¹ In a small, dust-mote-filled workshop in Chicago, Elena creates voices. She is a luthier, a craftsperson (36) who specializes in the repair and restoration of stringed instruments. While the world is full of mass-produced violins, Elena works on the "sick" ones—antique instruments that have suffered centuries of wear, weather, and neglect. Her patients are often older than the country she lives in.

² To the untrained eye, a crack in a violin's body looks like a simple fracture in wood. To Elena, it is a wound in the instrument's soul. Fixing it requires more than just (37) glue, it demands an understanding of physics, chemistry, and history. She begins by removing the top plate, a delicate operation performed with a thin, heated knife. Once the instrument is open, she can see the internal architecture: the bass bar, the soundpost, and the lining strips.

³ (38) Elena's most recent project was a cello from 1790. It had been crushed in a shipping accident, its ribs splintered and its varnish scarred. Most luthiers would have declared it a total loss. Elena, (39) however, saw potential. She spent three months humidifying the wood to restore its shape. Then, using tiny "cleats"—small squares of spruce—she reinforced the cracks from the inside. (40) Each cleat had to be carved by hand to match the grain of the original wood.

⁴ The final step is the varnish. Modern synthetic varnishes are durable, but they stifle the sound. Elena mixes her own recipes using natural resins like amber, mastic, and sandarac. She applies the varnish in microscopic layers, (41) polishing each one with a cloth dipped in olive oil and rottenstone. This process can take weeks, but it is essential. The varnish must protect the wood while allowing it to vibrate freely, a paradox that has challenged makers for centuries.

⁵ When the cello was finally strung and tuned, Elena played a single low note. The sound was rich and dark, filling the small room with a resonance that felt physical. It was no longer a broken collection of wood; it was a living thing again. (42) Elena smiled, wiping the rosin dust from her hands. She isn't just fixing instruments; she is preserving history, one note at a time. (43)

Which choice best maintains the stylistic tone of the passage?

PASSAGE II: Defeat from Above

¹ In late 1932, the Australian government faced a unique crisis. Following the Great Depression, struggling wheat farmers in Western Australia were besieged by a migrating force of 20,000 emus. These flightless birds, standing up to six feet tall, (13) devastated crops and destroyed fences. Desperate for help, the farmers, many of (14) whom were veterans of World War I, petitioned the government for military aid. The Minister of Defence, Sir George Pearce, agreed to deploy troops. He believed the birds would be easy targets for modern weaponry. (22)

² (15) Commanded by Major G.P.W. Meredith, the plan was simple. Two soldiers armed with Lewis machine guns and 10,000 rounds of ammunition would cull the population. The media dubbed the operation "The Great Emu War." However, the emus proved to be (16) a formidable and surprisingly strategic adversary.

³ The first engagement took place on November 2. The soldiers spotted a group of fifty emus and opened fire from a distance. The birds, (17) however, scattered instantly. They ran in every direction, making it nearly impossible to aim. Meredith noted that the emus seemed to have a leader who kept watch while the others ate, warning the flock of approaching danger. Later, the soldiers attempted to ambush a larger group of 1,000 emus near a dam. They waited until the birds were at point-blank range before firing. The gun jammed after only a dozen shots, and the flock escaped.

⁴ Meredith was astounded by the birds' resilience. "If we had a military division with the bullet-carrying capacity of these birds," he wrote, "it would face any army in the world." (18) The emus' speed and guerrilla tactics rendered the machine guns useless. By the time the operation was withdrawn, the military had expended thousands of rounds of ammunition (19) to take down only a fraction of the birds.

⁵ The "war" was a humiliation for the government. It highlighted the unpredictability of nature and the limits of military force. Ultimately, the farmers found a better solution: the bounty system. By 1934, over 57,000 bounties had been claimed, proving that local incentive was more effective than heavy artillery. The Great Emu War remains a curious footnote in history, a time when humans fought the (20) birds, it was the birds who won.

Which choice best maintains the tone of the passage?

PASSAGE III: The Science of Art Restoration

¹ For centuries, the restoration of classic paintings relied on a delicate, and often dangerous, physical touch. Restorers used to rely on harsh (21) chemicals, these solvents could easily strip away original layers of paint along with the dirt. Today, however, the intersection of art and technology has introduced a new era of preservation. The use of modern lasers and X-ray fluorescence (22) are revolutionizing the way museums care for their most prized artifacts.

² One of the most significant breakthroughs in restoration is the use of laser ablation. When a painting has accumulated centuries of soot or discolored varnish, conservators can fire a highly focused laser at the canvas. The laser (23) safely vaporizes the layer of grime. Because the dirt absorbs light at a different frequency than the original pigments, the laser removes the filth without heating or damaging the artwork beneath it. (24) On the other hand, the painting can reveal (25) it's true, original colors for the first time in centuries.

³ (26) Peeling away the darkened varnish, the brilliant blue skies of Renaissance landscapes are suddenly revealed to the restorers. This process allows experts to see the brushstrokes exactly as the artist intended.

⁴ In addition to lasers, restorers now use X-ray fluorescence (XRF) scanners to map the chemical composition of a painting. By analyzing the metallic elements present in the pigments, such as the lead in white paint or the copper in green paint, XRF scanners can look through the top layer of art. (27) This technology has allowed historians to discover hidden sketches and abandoned compositions painted over by the artists themselves.

⁵ It takes years of specialized training to master these technologies. A modern conservator must be a hybrid: part art historian, part chemist, and part technician. They are ultimately (28) responsible of preserving human history. By combining a deep respect for antiquity with the power of modern physics, they ensure that (29) old, antique masterpieces will survive for future generations to study and enjoy. (30)

Which choice provides the most appropriate academic tone for the passage?

PASSAGE V: The River of Grass

¹ In the early twentieth century, the general consensus regarding the Florida Everglades was that it was a useless, disease-ridden swamp. Developers and politicians viewed the millions of acres of wetlands as a problem to be solved. They embarked on massive drainage projects, digging canals and building levees to convert the marsh into dry, arable land for farming and real estate. For decades, the destruction of the Everglades was celebrated as a triumph of human engineering over nature. (41)

² One woman, (42) however, saw the Everglades differently. Marjory Stoneman Douglas, a freelance writer and journalist, moved to Miami in 1915. She spent years exploring the vast wetlands, observing the intricate balance of the ecosystem. In 1947, she published a groundbreaking book titled The Everglades: River of Grass.

³ The title itself was revolutionary. By calling it a "river," Douglas completely reframed how the public understood the region. She explained that the Everglades was not a stagnant swamp, but a wide, shallow sheet of water flowing imperceptibly slowly from Lake Okeechobee southward to the Florida Bay. (43) This sheet of water, rarely more than knee-deep, supported a staggering diversity of wildlife. Douglas vividly described the sawgrass marshes, the cypress domes, and the delicate wading birds that relied on the seasonal floods.

⁴ Douglas's book was a bestseller, (44) and it catalyzed the early environmental movement. She fiercely argued that draining the wetlands was ecological suicide. Without the slow flow of freshwater, the underground aquifers that supplied South Florida's drinking water would dry up or become contaminated by saltwater intrusion from the ocean. (45) In addition, the dry peat soil of the drained marshes became highly flammable, leading to massive, uncontrollable muck fires.

⁵ Despite the success of her book, the drainage projects continued. (46) Infuriated by the government's inaction, Douglas founded the Friends of the Everglades in 1969, when she was 79 years old. For the next thirty years, she was a relentless advocate for the wetlands. She attended public hearings, organized protests, and famously stated, "The Everglades is a test. If we pass it, we may get to keep the planet."

⁶ Today, the Comprehensive Everglades Restoration Plan is the largest environmental restoration project in history. Engineers are currently working to undo the damage of the past century by filling in canals and allowing the water to flow naturally once again. (47) While the ecosystem is still threatened by pollution and climate change. (48) It is widely acknowledged that the Everglades would likely have been paved over completely if not for Marjory Stoneman Douglas. (49) Her legacy is a reminder that a single voice, armed with a profound understanding of nature, can change the course of history. (50)

Which of the following alternatives to the underlined portion best maintains the formal, authoritative tone of the passage?

PASSAGE III: The Architecture of Sleep

¹ Sleep is often viewed as a passive state, a time when the body shuts down to conserve energy. In reality, however, sleep is a highly active and complex biological process. While we rest, our brains are engaging in a neurological workout that is essential for physical health and mental clarity. This nightly maintenance is (23) governed by two opposing forces: the sleep drive, which builds up the longer we are awake, and the circadian rhythm, an internal "clock" that regulates our sleep-wake cycle based on light and darkness.

² Once asleep, the brain cycles through four distinct stages. The first three stages are known collectively as non-rapid eye movement (NREM) sleep. During the deepest part of NREM, (24) heart rate slows down, blood pressure drops, and the body repairs tissues. (25) Conversely, the fourth stage is rapid eye movement (REM) sleep. In this phase, brain activity spikes to levels similar to wakefulness. This is the stage where dreaming occurs and (26) memories were consolidated from short-term to long-term storage.

³ One of the most critical functions of sleep is "taking out the trash." For years, scientists wondered how the brain, (27) unlike other organs, cleared out metabolic waste products. In 2013, researchers discovered the "glymphatic system," a macroscopic waste clearance system formed by glial cells. During deep sleep, these cells shrink, increasing the space between neurons by up to 60 percent. This allows cerebrospinal fluid (28) to flow rapid through the brain tissue, flushing out toxic proteins associated with neurodegenerative diseases. (32)

⁴ (29) Neglecting this biological need has serious consequences. Sleep deprivation impairs cognitive function, weakens the immune system, and increases the risk of chronic conditions like heart disease. (30) Experts recommend adults get between seven and nine hours of sleep per night. Despite these risks, modern society often treats sleep as a luxury rather than a necessity. Artificial lighting and digital screens (31) disrupts the production of melatonin, the hormone that signals to the body that it is time to rest.

⁵ We cannot cheat our biology. Caffeine and sheer willpower can only mask the symptoms of fatigue for so long. Eventually, the "sleep debt" must be repaid. By prioritizing sleep, we are not being lazy; we are investing in our long-term health. The architecture of sleep is built on a foundation of millions of years of evolution, and (33) it remains the most effective medicine we have. (34)

Which choice most effectively maintains the formal, scientific tone of the passage?

PASSAGE IV: The Violin Doctor

¹ In a small, dust-mote-filled workshop in Chicago, Elena creates voices. She is a luthier, a craftsperson (36) who specializes in the repair and restoration of stringed instruments. While the world is full of mass-produced violins, Elena works on the "sick" ones—antique instruments that have suffered centuries of wear, weather, and neglect. Her patients are often older than the country she lives in.

² To the untrained eye, a crack in a violin's body looks like a simple fracture in wood. To Elena, it is a wound in the instrument's soul. Fixing it requires more than just (37) glue, it demands an understanding of physics, chemistry, and history. She begins by removing the top plate, a delicate operation performed with a thin, heated knife. Once the instrument is open, she can see the internal architecture: the bass bar, the soundpost, and the lining strips.

³ (38) Elena's most recent project was a cello from 1790. It had been crushed in a shipping accident, its ribs splintered and its varnish scarred. Most luthiers would have declared it a total loss. Elena, (39) however, saw potential. She spent three months humidifying the wood to restore its shape. Then, using tiny "cleats"—small squares of spruce—she reinforced the cracks from the inside. (40) Each cleat had to be carved by hand to match the grain of the original wood.

⁴ The final step is the varnish. Modern synthetic varnishes are durable, but they stifle the sound. Elena mixes her own recipes using natural resins like amber, mastic, and sandarac. She applies the varnish in microscopic layers, (41) polishing each one with a cloth dipped in olive oil and rottenstone. This process can take weeks, but it is essential. The varnish must protect the wood while allowing it to vibrate freely, a paradox that has challenged makers for centuries.

⁵ When the cello was finally strung and tuned, Elena played a single low note. The sound was rich and dark, filling the small room with a resonance that felt physical. It was no longer a broken collection of wood; it was a living thing again. (42) Elena smiled, wiping the rosin dust from her hands. She isn't just fixing instruments; she is preserving history, one note at a time. (43)

Which choice best maintains the stylistic tone of the passage?

"The Vertical Forests of Milan\n\nIn 2014, the skyline of Milan, Italy, began to change in a way that surprised many observers. Two residential towers, known as Bosco Verticale (Vertical Forest), rose above the Porta Nuova district. At first, [1] Italian architect Stefano Boeri envisioned these structures, critics were skeptical. They claimed that planting trees on balconies was a gimmick that would cause structural issues. Boeri, however, believed the naysayers were totally wrong. [2]\n\nBoeri's design called for the towers to host 900 trees, 5,000 shrubs, and 11,000 floral plants. This "living facade" not only improves air quality but also regulates temperature. The vegetation, which includes oak, beech, and larch trees act [3] as a natural shield against the intense Mediterranean sun. To ensure the safety of the structure, botanists tested the wind resistance of the trees in a wind tunnel. Similarly, [4] the engineering team reinforced the concrete balconies with steel to support the immense weight of the soil.\n\nThe result is a self-sufficient ecosystem that changes colors with the seasons. In autumn, the leaves turn golden and red; in winter, they fall to let in sunlight. [5] Residents live nestled among the branches, enjoying a connection to nature rarely found in urban environments. Boeri's work has inspired similar projects in China and the Netherlands, proving that architecture and ecology can collaborate [6] to create sustainable cities. As cities grow denser, the Vertical Forest offers a blueprint for a greener future, demonstrating that nature need not be pushed, to the margins, [7] of urban life.\n\nThe project's success suggests a new path forward for urban planning. [8] By integrating living systems into high-rise buildings, architects can help reduce the carbon footprint of cities. [9]"

Which choice best maintains the tone and style of the essay?