Adult ESL/ELL Intermediate Quiz: Main Ideas And Supporting Details
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Main Ideas And Supporting DetailsQuestion 1 of 10

Microplastics — tiny pieces of plastic less than five millimeters in size — have been found in oceans, rivers, soil, and even in the air we breathe.

They come from two main sources. Some microplastics are manufactured at a small size intentionally, such as the microbeads found in certain face scrubs and toothpastes. Others form when larger plastic items, like bottles or bags, break apart over time due to sunlight, wind, and water.

Scientists have detected microplastics inside fish, birds, and other wildlife. More recently, researchers have found microplastics in human blood, lungs, and placentas, though the full health effects on humans are not yet understood.

Governments and environmental organizations are calling for reduced plastic production and better waste management to address the growing problem.

A classmate claims: 'The main idea of this passage is that microplastics come from two different sources.' Which response best evaluates this claim?

The claim is correct because the passage spends the most words explaining how microplastics are created from manufactured microbeads and from the breakdown of larger plastics.
The claim is partially correct because the two sources are the main idea, but the classmate should also mention that microplastics have been found in living things including humans.
The claim is incorrect because the two sources are a supporting detail; the main idea is that microplastics are widespread, found in the environment and in living things, and pose a growing concern requiring action.
The claim is incorrect because the main idea of the passage is specifically about the health effects of microplastics on humans, which is what the passage is building toward in its final sentences.
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Adult ESL/ELL Intermediate Quiz

Adult ESL/ELL Intermediate Quiz: Main Ideas And Supporting Details

Practice Main Ideas And Supporting Details in Adult ESL/ELL Intermediate with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Main Ideas And Supporting Details, giving you a quick way to practice the rules, question types, and explanations that matter most for Adult ESL/ELL Intermediate.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Microplastics — tiny pieces of plastic less than five millimeters in size — have been found in oceans, rivers, soil, and even in the air we breathe.

They come from two main sources. Some microplastics are manufactured at a small size intentionally, such as the microbeads found in certain face scrubs and toothpastes. Others form when larger plastic items, like bottles or bags, break apart over time due to sunlight, wind, and water.

Scientists have detected microplastics inside fish, birds, and other wildlife. More recently, researchers have found microplastics in human blood, lungs, and placentas, though the full health effects on humans are not yet understood.

Governments and environmental organizations are calling for reduced plastic production and better waste management to address the growing problem.

A classmate claims: 'The main idea of this passage is that microplastics come from two different sources.' Which response best evaluates this claim?

  1. The claim is correct because the passage spends the most words explaining how microplastics are created from manufactured microbeads and from the breakdown of larger plastics.
  2. The claim is partially correct because the two sources are the main idea, but the classmate should also mention that microplastics have been found in living things including humans.
  3. The claim is incorrect because the two sources are a supporting detail; the main idea is that microplastics are widespread, found in the environment and in living things, and pose a growing concern requiring action. (correct answer)
  4. The claim is incorrect because the main idea of the passage is specifically about the health effects of microplastics on humans, which is what the passage is building toward in its final sentences.
Explanation: When identifying the main idea of a passage, ask yourself: What is this entire passage about, from beginning to end? The main idea must cover everything the author discusses — not just one part of it. A supporting detail, by contrast, helps explain or develop the main idea but doesn't represent the whole passage on its own. The classmate's claim focuses only on the second paragraph, where the two sources of microplastics are described. But notice how the passage actually moves: it opens by establishing that microplastics are found everywhere — oceans, air, soil — then explains their sources, then shows they're inside wildlife and humans, and finally calls for action. The two sources are one piece of a much larger picture. Answer C correctly identifies that the real main idea is the scope and seriousness of the microplastics problem: they're widespread, present in living things, and require a response. A is tempting because the sources do receive significant attention, but word count doesn't determine the main idea — coverage of the whole passage does. B is a reasonable compromise, but calling the two sources "the main idea" is still wrong; they're a supporting detail regardless of what you add alongside them. D goes too far in the opposite direction — health effects on humans appear only briefly, and the author explicitly says those effects "are not yet understood," making that a minor point, not the main idea. A useful strategy: after reading, try to summarize the whole passage in one sentence. If your summary only covers one paragraph, look again — you've likely found a detail, not the main idea.

Question 2

Community gardens are becoming more popular in cities across the United States. These shared spaces allow city residents to grow their own fruits and vegetables, even without a backyard. Many community gardens are organized by neighborhood groups, and participants are usually assigned a small plot of land to tend. Beyond providing fresh food, community gardens offer other important benefits. Studies show that people who participate in community gardens report feeling less stressed and more connected to their neighbors. Some cities have even noticed that neighborhoods with community gardens have lower rates of certain crimes, though researchers are still investigating the exact reasons for this connection.

Which of the following best states the main idea of this passage?

  1. Community gardens are spaces where city residents grow food and also experience social and emotional benefits that improve neighborhood life. (correct answer)
  2. Community gardens reduce crime rates in cities, which is why neighborhood groups have started organizing them across the United States.
  3. City residents who lack backyard space can participate in community gardens by applying for a small plot of land through their local neighborhood group.
  4. Research on community gardens focuses mainly on the connection between shared gardening spaces and reduced stress levels in urban populations.
Explanation: When a question asks for the main idea, your job is to find the statement that covers the whole passage — not just one detail or one paragraph. Ask yourself: "Does this answer reflect what the entire passage is about, from beginning to end?" This passage covers several things: what community gardens are, how they work, and the benefits they provide — including fresh food, reduced stress, stronger neighbor connections, and possibly lower crime. A strong main idea statement must capture all of these threads together. That's exactly what A does. It identifies community gardens as places to grow food and acknowledges the broader social and emotional benefits, giving you a complete picture of the passage's overall message. B is a trap because it focuses too heavily on crime reduction and presents it as the reason community gardens were started — but the passage never says that. Crime reduction is mentioned briefly, and its causes are still being investigated. This answer overstates one small detail and gets the cause-and-effect backwards. C describes only a specific logistical detail from the middle of the passage — how residents get a plot of land. This is a supporting fact, not the central message. Main ideas are bigger than individual facts. D is misleading because the passage mentions researchers are still investigating the crime connection, not that research "focuses mainly" on stress levels. This answer misrepresents both the scope and focus of research discussed. Study tip: On main idea questions, eliminate any answer that's too narrow (one detail) or too extreme (overstates something). The correct answer will be broad enough to "umbrella" the whole passage without adding claims the author never made.

Question 3

Public libraries have changed significantly over the past two decades. While books remain central to their mission, modern libraries now offer a wide range of services that go far beyond lending printed materials. Many libraries provide free access to computers and high-speed internet, which is especially important for community members who cannot afford these resources at home. Libraries also host job training workshops, English language classes, early childhood literacy programs, and mental health resource fairs. Some urban libraries have even added seed libraries, tool-lending programs, and recording studios. Despite budget cuts in many cities, librarians argue that these expanded services make libraries more essential than ever to the communities they serve.

Which sentence most accurately states the main idea of this passage?

  1. Public libraries are struggling with budget cuts but continue to offer books and a small number of digital services to community members.
  2. Modern public libraries have expanded well beyond book lending to provide diverse services that address a broad range of community needs. (correct answer)
  3. Urban libraries are unique because they offer creative programs like seed libraries, tool lending, and recording studios that other libraries do not provide.
  4. Free internet and computer access at public libraries is the most significant new service because it helps people who cannot afford technology at home.
Explanation: When a question asks for the main idea, your job is to find the sentence that captures what the entire passage is about — not just one detail or one paragraph. Ask yourself: "What is the author's overall point?" This passage opens by saying libraries have "changed significantly," then lists many new services (internet access, workshops, language classes, literacy programs, studios, seed libraries, and more), and closes by arguing these expansions make libraries "more essential than ever." The central message is that modern libraries do much more than lend books, and that this growth serves many community needs. Answer B captures this perfectly — it reflects both the breadth of new services and their purpose for the community, making it the strongest main idea statement. Answer A is too negative and too narrow. The passage briefly mentions budget cuts, but that is a minor detail, not the focus. The author's tone emphasizes growth and value, not struggle, and "a small number of digital services" badly understates what the passage describes. Answer C focuses only on urban libraries and only on three creative programs (seed libraries, tool lending, recording studios). These appear in just one sentence of the passage. A main idea cannot come from a single supporting detail. Answer D highlights internet and computer access as the most significant service — but the passage never ranks services by importance. Choosing one detail and calling it most important goes beyond what the text actually says. A useful strategy: the main idea is almost never the most specific or most extreme statement. If an answer feels too narrow, too dramatic, or only supported by one sentence, it is likely a distractor.

Question 4

Food deserts are areas, often in low-income urban or rural communities, where residents have limited access to affordable, nutritious food. Supermarkets and grocery stores are typically far away or nonexistent in these areas, leaving residents dependent on convenience stores and fast-food restaurants that offer few healthy options. Transportation is a major barrier: many residents in food deserts do not own a car and must rely on public transit, which makes long trips to distant grocery stores difficult, especially when carrying bags of food. As a result, people living in food deserts often consume diets high in processed foods, which are linked to higher rates of obesity, diabetes, and heart disease in these communities. Some city governments have introduced incentive programs to attract grocery stores to underserved areas, but critics argue that without also addressing poverty and transportation, new stores alone will not solve the problem.

According to the passage, why does living in a food desert often lead to poor dietary choices? Choose the answer that reflects the most complete and accurate understanding of the passage.

  1. People in food deserts prefer fast food and convenience stores because these options are more familiar and require less time to prepare than items purchased at a grocery store.
  2. Residents lack access to affordable healthy food because grocery stores are distant and transportation barriers make reaching them difficult, leaving processed food as the most available option. (correct answer)
  3. Low-income residents cannot afford healthy food even when grocery stores are nearby, so distance and transportation are not the main reasons for poor diets — cost is the primary factor the passage identifies.
  4. City governments have failed to attract grocery stores to food deserts through incentive programs, leaving residents with no realistic food options other than fast food, which directly causes the high rates of obesity described.
Explanation: When a reading passage question asks you to explain why something happens, your job is to find the cause-and-effect relationship the author directly states — not to guess at motivations or focus on just one detail while ignoring others. The passage explains that food deserts lead to poor dietary choices through a chain of connected reasons: grocery stores are far away or absent, residents often lack cars and depend on difficult public transit, and so processed foods from nearby convenience stores become the most realistic option available. Answer B captures this full chain — distance, transportation barriers, and the resulting dependence on processed food — which is exactly what the passage describes. Answer A is a trap because it invents a reason the passage never mentions. The passage says nothing about people preferring fast food or finding it more familiar. Never choose an answer that adds information not found in the text. Answer C misreads the passage's emphasis. While cost is mentioned ("affordable" food), the passage specifically highlights distance and transportation as the major barriers. C actually contradicts the passage by claiming distance and transportation are not the main reasons — the opposite of what the author argues. Answer D focuses only on the incentive programs mentioned in the final sentence, which is a supporting detail, not the central cause. It also overstates the claim — the passage says programs alone won't solve the problem, not that they have completely failed with no impact. A useful strategy: on reading comprehension questions, always return to the passage and ask, "Did the author actually say this?" If the answer choice adds outside assumptions or distorts the author's emphasis, eliminate it.

Question 5

The gig economy refers to a labor market in which workers are hired for short-term contracts or freelance work rather than permanent positions. Ride-share drivers, food delivery workers, and freelance designers are common examples of gig workers. Supporters of the gig economy argue that it offers workers greater flexibility to set their own hours and choose the projects they take on. However, critics point out significant drawbacks. Gig workers are typically classified as independent contractors rather than employees, which means they do not receive benefits such as health insurance, paid sick leave, or employer contributions to retirement accounts. Additionally, income in gig work can be highly unpredictable, making it difficult for workers to budget or plan for the future. Some labor advocates argue that the flexibility of gig work is often overstated, as many workers take gig jobs out of financial necessity rather than genuine preference.

Which of the following best identifies the main idea of this passage and is supported by the details provided?

  1. The gig economy provides flexibility for workers but comes with serious disadvantages related to job security, benefits, and income stability that make it problematic for many workers. (correct answer)
  2. The gig economy is a growing labor market that offers genuine freedom and flexibility to workers who want to escape the limitations of traditional employment.
  3. Gig workers are classified as independent contractors primarily so that companies can avoid paying taxes, which is the central problem the passage describes.
  4. Labor advocates believe that gig work should be eliminated and replaced with traditional employment, which is the main argument the passage presents to the reader.
Explanation: When a question asks for the main idea, your job is to find the statement that captures what the entire passage is about — not just one detail or one paragraph. A strong main idea answer balances all the major points the author makes, including both sides of an argument if both sides are discussed. This passage does two things: it introduces the gig economy and acknowledges its flexibility, but it spends most of its space explaining the serious problems — no benefits, unpredictable income, and the argument that flexibility is often overstated. Answer A captures this balance perfectly. It acknowledges the flexibility argument while centering the passage's emphasis on the real disadvantages gig workers face. Every sentence in the passage either introduces the topic, presents the flexibility claim, or challenges it — all of which A reflects. Answer B fails because it presents only the positive side of the gig economy as if that were the author's main point. The passage actually pushes back against this view, calling the flexibility argument "overstated." B ignores the critical half of the passage entirely. Answer C introduces a detail — tax avoidance — that the passage never actually mentions. The passage says companies avoid paying benefits, not taxes. This is a classic distractor that sounds reasonable but adds information the author never provided. Answer D overstates the critics' position. Labor advocates in the passage argue that flexibility is overstated, but the passage never claims they want to eliminate gig work entirely. Pushing one side's view further than the text supports is a common trap. Strategy tip: For main idea questions, eliminate answers that are too narrow (one detail), too broad, or that add claims the passage never makes.

Question 6

Urban heat islands are a well-documented phenomenon in which cities experience significantly higher temperatures than the surrounding rural areas. The primary cause is the replacement of natural land cover — such as trees, grass, and soil — with buildings, roads, and parking lots made of concrete and asphalt. These materials absorb heat during the day and release it slowly at night, preventing cities from cooling down as rural areas do. Human activities also contribute: vehicles, air conditioning units, and industrial equipment release heat directly into the urban environment. The consequences are serious. During heat waves, urban heat islands can make already dangerous temperatures even more extreme, increasing the risk of heat-related illness and death, particularly among elderly residents and outdoor workers. Some cities are combating this effect by planting more trees, installing green roofs, and using lighter-colored paving materials that reflect rather than absorb heat.

Which of the following correctly identifies a main idea and a supporting detail from the passage?

  1. Main idea: Urban heat islands are caused primarily by asphalt and concrete replacing natural land cover. Supporting detail: Some cities are responding by planting trees, installing green roofs, and using lighter-colored paving materials that reflect heat.
  2. Main idea: Green roofs and lighter-colored pavement are the most proven and effective solutions to the urban heat island problem according to city planners. Supporting detail: Urban areas are hotter because natural land cover such as trees and grass has been replaced by buildings, roads, and parking lots.
  3. Main idea: Elderly residents and outdoor workers face the greatest health risks during urban heat waves, making them the passage's central focus. Supporting detail: Human activities such as vehicles, air conditioning units, and industrial equipment release extra heat directly into the urban environment.
  4. Main idea: Cities are dangerously hotter than rural areas due to human-made changes, and this poses serious health risks that some cities are working to address. Supporting detail: Concrete and asphalt absorb heat during the day and release it slowly at night, preventing cities from cooling as rural areas do. (correct answer)
Explanation: When a question asks you to identify a main idea paired with a supporting detail, remember the key difference: the main idea covers the whole passage's central point, while a supporting detail is one specific fact or example that backs it up. The main idea should be broad enough to "hold" all the other information in the passage. Answer D captures this perfectly. Its main idea — that cities are dangerously hotter than rural areas due to human-made changes, and that some cities are working to address it — reflects the full scope of the passage, from causes to consequences to solutions. The supporting detail it pairs with (concrete and asphalt absorbing and slowly releasing heat) is a specific fact from the passage that explains one part of the main idea. That's exactly the relationship you're looking for. Answer A is tempting, but it makes a mistake: the "main idea" it states is actually just one supporting detail (the cause), not a summary of the whole passage. The passage covers much more than just asphalt and concrete. Answer B is incorrect because it misrepresents the passage. The text never says green roofs and lighter-colored pavement are "the most proven and effective solutions according to city planners" — that's an opinion the passage doesn't make. Be careful of answer choices that go beyond what the text actually says. Answer C is a common trap: it takes a minor detail (elderly residents and outdoor workers) and incorrectly elevates it to the "central focus" of the passage. A single sentence about a subgroup is never the main idea. Study tip: Always ask yourself, "Does this main idea cover the whole passage, or just one part?" If it only covers one section, it's probably a detail, not a main idea.

Question 7

Financial literacy — the ability to understand and manage personal finances — is considered an important life skill, yet it is rarely taught in schools. Surveys consistently show that many adults struggle with basic financial concepts such as compound interest, credit scores, and the difference between a Roth IRA and a traditional IRA. The consequences of low financial literacy can be severe: people who do not understand how interest works may take on high-interest debt without realizing the long-term cost, while those unfamiliar with retirement accounts may fail to save adequately during their working years. Some researchers argue that improving financial literacy through education could reduce wealth inequality, because low-income individuals are often disproportionately harmed by financial mistakes driven by lack of knowledge. However, other researchers caution that financial literacy education alone is unlikely to close the wealth gap, since structural factors — such as wage inequality and limited access to financial institutions — play a larger role in determining financial outcomes than individual knowledge does.

Based on the passage, which of the following conclusions is best supported by the information provided?

  1. Financial literacy education is the most powerful tool available for reducing wealth inequality, and expanding it in schools should be the top policy priority for governments.
  2. Because structural factors are more important than individual knowledge, teaching financial literacy in schools has no meaningful value and would not help any students.
  3. Financial literacy is an important skill that many adults lack, and while education about it may help individuals avoid costly mistakes, it is unlikely by itself to solve larger wealth inequality problems. (correct answer)
  4. The primary reason wealth inequality exists is that low-income individuals make poor financial decisions due to ignorance, which financial literacy programs would directly and completely fix.
Explanation: When a reading question asks which conclusion is "best supported," your job is to find the answer that accurately reflects all of the passage's main ideas — not just one part of it. Watch out for answers that take one idea too far or ignore another. The passage makes two clear points: (1) financial literacy is a real and important skill that many adults lack, and poor understanding leads to costly mistakes like high-interest debt; and (2) financial literacy education alone is unlikely to close the wealth gap because structural factors like wage inequality matter more. Answer C captures both of these ideas faithfully — it acknowledges the personal value of financial education while being honest about its limits. That balance is exactly what the passage supports. Answer A goes too far. The passage never says financial literacy education is the "most powerful tool" or calls it a "top policy priority." This exaggerates a cautious, nuanced argument into a strong claim the author never makes. Answer B makes the opposite mistake. Just because structural factors are more important doesn't mean education has no value. The passage suggests education can help individuals avoid mistakes — saying it's completely worthless contradicts this. Answer D distorts the passage in a serious way. The text mentions that low-income people are "disproportionately harmed" by financial mistakes, but it never says poor decisions are the primary cause of wealth inequality, and it certainly doesn't claim financial literacy programs would "completely fix" the problem. A useful strategy: on inference questions, eliminate any answer that uses absolute words like "most," "no," "never," or "completely" unless the passage itself uses that kind of strong language.

Question 8

Sleep is essential for physical and mental health, yet millions of adults do not get enough of it. The recommended amount for most adults is seven to nine hours per night. When people consistently sleep less than this, they face a range of consequences. In the short term, sleep deprivation causes difficulty concentrating, slower reaction times, and irritability. Over a longer period, chronic lack of sleep is linked to more serious conditions, including a weakened immune system, increased risk of heart disease, and higher rates of anxiety and depression. Experts note that many people underestimate how sleep-deprived they are because the brain gradually adjusts to functioning poorly, making reduced performance feel normal.

Which detail from the passage best supports the idea that sleep deprivation is more dangerous than most people realize?

  1. The recommended amount of sleep for adults is seven to nine hours per night, yet surveys show that millions of people across many countries regularly fall short of this standard.
  2. Short-term effects of sleep deprivation include difficulty concentrating, slower reaction times, and increased irritability, all of which can interfere with daily work and relationships.
  3. The brain gradually adjusts to poor functioning after chronic sleep loss, which causes people to underestimate how impaired they actually are. (correct answer)
  4. Chronic sleep deprivation is associated with serious long-term health risks such as heart disease, a weakened immune system, and higher rates of anxiety and depression.
Explanation: When a question asks which detail best supports a specific idea, your job is to match the evidence to the exact claim being made — not just find something that sounds related. Here, the claim is that sleep deprivation is more dangerous than most people realize. That phrase is the key. You need a detail that explains why people fail to recognize the danger — not simply a detail that shows sleep is harmful. Choice C does exactly that. The passage explains that the brain slowly adapts to functioning poorly, so people stop noticing how impaired they are. This directly explains the "more dangerous than people realize" part — the danger is hidden because the body masks it. That's the strongest match to the specific idea in the question. Choice D is tempting because it lists serious health consequences, which does show that sleep deprivation is dangerous. However, it doesn't explain why people underestimate the danger. It only proves sleep is harmful — not that the harm goes unrecognized. Many students choose D here, which is the classic trap. Choice B describes short-term effects like irritability and slow reaction times. These are real problems, but they're common knowledge and don't speak to anything being hidden or underestimated. Choice A is background information about how widespread the problem is. It tells you many people sleep too little, but it says nothing about whether people understand the consequences. Study tip: When a question uses a phrase like "more than people realize" or "underestimated," look for the answer that explains a gap in awareness — not just evidence that something is serious.

Question 9

Volunteering has long been associated with benefits for the communities that volunteers serve. However, research increasingly shows that volunteering also produces significant benefits for the volunteers themselves. Studies have found that people who volunteer regularly report higher levels of life satisfaction and a stronger sense of purpose compared to non-volunteers. Older adults who volunteer show slower rates of cognitive decline, and some research suggests that volunteering is associated with lower rates of depression. One proposed explanation is that volunteering creates social connections, which are independently known to improve mental and physical health. Another explanation is that helping others activates reward centers in the brain, producing feelings of well-being. Importantly, researchers caution that these studies show a correlation between volunteering and better health outcomes, but cannot definitively prove that volunteering directly causes these improvements.

The final sentence of the passage is most important to the main idea because it —

  1. introduces a new argument that contradicts the rest of the passage by suggesting volunteering has no real health benefits for the volunteers themselves.
  2. shifts the main idea of the passage from the benefits of volunteering to the limitations of scientific research methods used to study human behavior.
  3. summarizes the two scientific explanations for why volunteering improves health by mentioning social connection and brain reward systems one final time.
  4. provides a key qualification by clarifying that the benefits associated with volunteering are correlational and have not been proven to be directly caused by volunteering. (correct answer)
Explanation: When a question asks why a specific sentence is "most important to the main idea," your job is to figure out what role that sentence plays in the overall argument — not just what it says, but what it does for the passage. The passage builds a case that volunteering benefits volunteers themselves, citing studies on life satisfaction, cognitive decline, and depression. But the final sentence steps back and adds a critical warning: these studies show correlation, not causation. This is a key scientific distinction. Correlation means two things tend to appear together; causation means one directly produces the other. The researchers cannot yet confirm that volunteering causes the health improvements — only that the two are linked. This qualification shapes how you should understand everything that came before it, making D the correct answer. It identifies the final sentence's function accurately: it limits the strength of the claims without canceling them. Choice A is a trap because it overstates the sentence's meaning. The sentence doesn't say volunteering has "no real benefits" — it simply says the benefits haven't been proven as direct causes. That's a much weaker claim than contradiction. Choice B misreads the sentence's scope; it doesn't shift the whole passage toward a discussion of scientific methods in general. It only cautions about this research. Choice C is wrong because the final sentence doesn't mention social connections or brain reward systems at all — that was the previous sentences' job. As a study tip, watch for answer choices that exaggerate or distort a sentence's meaning. The correct answer for "function" questions usually describes what the sentence actually does — no more, no less.

Question 10

Many people believe that drinking eight glasses of water per day is essential for good health. However, health experts now say this guideline is not based on strong scientific evidence. The amount of water a person needs actually depends on several factors, including body size, physical activity level, and the climate where they live. People who exercise heavily or live in hot climates need more water than those who are less active or live in cooler areas. Additionally, a significant portion of daily water intake comes not from drinking water alone, but from the foods we eat, especially fruits and vegetables, which have high water content.

A student reads this passage and writes the following summary: 'You should drink eight glasses of water a day because this is what health experts recommend for staying healthy.' What is the most accurate way to describe this summary?

  1. The summary reflects the main idea correctly because the passage discusses the importance of drinking enough water every day.
  2. The summary misrepresents the main idea because the passage argues that the eight-glasses rule lacks strong scientific support and that water needs vary by individual. (correct answer)
  3. The summary partially reflects the main idea because the passage agrees that eight glasses is a useful starting point even if individual needs differ slightly.
  4. The summary misrepresents only a supporting detail because the passage's main idea is actually about the water content found in fruits and vegetables.
Explanation: When a question asks you to evaluate a summary, your job is to compare what the summary claims with what the passage actually says — especially the main idea, not just one detail. This passage makes a clear argument: the eight-glasses rule lacks strong scientific backing, and water needs vary depending on body size, activity level, and climate. The student's summary, however, states the opposite — that health experts recommend eight glasses for good health. That directly contradicts the passage, making B the correct answer. The summary doesn't just miss a detail; it reverses the central point of the entire passage. A is tempting because the passage does discuss daily water intake, so it feels related. But "discusses the importance of water" is too vague — the passage specifically challenges the eight-glasses rule, not endorses it. Choosing A means you're matching a topic instead of a main idea. C is a classic trap. It sounds reasonable and balanced, but the passage never calls eight glasses "a useful starting point." That idea is invented — nowhere in the text does the author soften the criticism that way. Be careful of answers that add information the passage doesn't include. D is wrong because fruits and vegetables are a supporting detail in the final sentence, not the main idea. The passage uses that detail to reinforce its larger argument about individual water needs — it's not the central focus. A good study tip: when evaluating summaries, ask yourself, "Does this match what the author was arguing, or just what the passage mentioned?" Those are very different things.