This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. Unlike electric forces (where like charges repel: two positive charges push apart, two negative charges push apart) and magnetic forces (where like poles repel: north-north repel, south-south repel), gravitational forces have no repulsive configuration—you cannot arrange masses to make them repel each other the way you can arrange charges (both positive) or magnets (both north poles facing) to create repulsion. Choice A is correct because it properly evaluates the flawed argument: the student incorrectly assumes that because magnets can repel, gravity must also be able to repel, but this ignores that magnetism and gravity are fundamentally different forces—magnetic forces can both attract and repel (opposite poles attract, like poles repel), while all gravitational observations (falling objects always fall down, orbits maintained by inward pull, tides showing water attracted to Moon) demonstrate only attraction, never repulsion. Choice B wrongly claims the argument is strong and that all forces must both attract and repel, when actually different forces have different properties—gravity only attracts. Choice C incorrectly validates the argument using astronaut floating as evidence of repulsion, when astronauts float due to free-fall (continuously falling toward Earth along with spacecraft) not because gravity pushes them away. Choice D wrongly accepts that like masses repel similar to like charges, but this has never been observed—all masses attract all other masses regardless of being similar or different.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. This universal attraction occurs because mass (the source of gravity) only comes in one type (positive), unlike electric charge (can be + or -) or magnetic poles (can be N or S), so there's no 'like repels like' for gravity the way there is for charges (++ repel) or magnets (NN repel). For comparison to other forces: Unlike electric forces (where like charges repel: two positive charges push apart, two negative charges push apart) and magnetic forces (where like poles repel: north-north repel, south-south repel), gravitational forces have no repulsive configuration—you cannot arrange masses to make them repel each other the way you can arrange charges (both positive) or magnets (both north poles facing) to create repulsion. Choice C is correct because it accurately explains that gravity differs from electric/magnetic by being only attractive. Choice A suggests gravity can repel like electric/magnetic forces, missing that gravity is fundamentally different (only one type of mass vs two types of charge or poles). The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. Gravitational attraction is truly universal: large masses attract each other (planets, stars, galaxies all pull together forming solar systems, galaxies, galaxy clusters), small masses attract each other (you and this book attract each other gravitationally, though force is imperceptibly tiny), different materials all attract (rock attracts rock, water attracts iron, everything attracts everything else), and there are no exceptions—no materials, no configurations, no conditions where gravity repels, which strongly supports the claim that gravity is always and only attractive. Choice A is correct because it correctly constructs argument using multiple evidence pieces all showing attraction with no repulsion. Choice B doesn't distinguish gravity from electric/magnetic, claiming all forces same in attraction/repulsion behavior. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions. If you ever see objects repelling (pushing apart), you know it's not gravity—it's either electric forces (like charges), magnetic forces (like poles), or mechanical forces (compressed spring, air pressure), but never gravitational forces.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. For observational evidence: Every single observation of gravitational force shows attraction: when you drop a book, it falls down toward Earth (Earth's gravity attracts the book), never up or sideways (no gravitational repulsion pushing it away); the Moon stays in orbit around Earth because Earth's gravity continuously pulls it inward (if gravity repelled at some distances or configurations, the Moon would spiral away, but it doesn't—it's held in orbit by attractive force); and ocean tides are high on the side facing the Moon because the Moon's gravity attracts the water creating a bulge (if gravity repelled, water would bulge away from Moon on opposite side only, but actually it bulges toward Moon showing attraction). Choice C is correct because it properly cites evidence showing only attraction: tides demonstrate gravitational attraction. Choice A is incorrect because it uses evidence that actually shows attraction (tides) but misinterprets it as repulsion. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions. If you ever see objects repelling (pushing apart), you know it's not gravity—it's either electric forces (like charges), magnetic forces (like poles), or mechanical forces (compressed spring, air pressure), but never gravitational forces. This certainty comes from the perfect record: in all of human history, every gravitational measurement and observation has shown attraction (literally billions of observations from falling objects to planetary motions to galactic clustering), with zero counterexamples of repulsion—such overwhelming one-sided evidence strongly supports the scientific claim that gravitational forces are always attractive, which is now a fundamental principle in physics that explains phenomena from why we don't float off Earth to how the universe's large-scale structure formed through gravitational attraction pulling matter together over billions of years.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. Unlike electric forces (where like charges repel: two positive charges push apart, two negative charges push apart) and magnetic forces (where like poles repel: north-north repel, south-south repel), gravitational forces have no repulsive configuration—you cannot arrange masses to make them repel each other the way you can arrange charges (both positive) or magnets (both north poles facing) to create repulsion. Choice C is correct because it accurately explains that gravity differs from electric/magnetic by being only attractive. Choice A incorrectly claims gravitational repulsion exists or has been observed, when actually no gravitational repulsion has ever been detected in any experiment or observation. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions. If you ever see objects repelling (pushing apart), you know it's not gravity—it's either electric forces (like charges), magnetic forces (like poles), or mechanical forces (compressed spring, air pressure), but never gravitational forces.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. Every single observation of gravitational force shows attraction: when you drop a book, it falls down toward Earth (Earth's gravity attracts the book), never up or sideways (no gravitational repulsion pushing it away); the Moon stays in orbit around Earth because Earth's gravity continuously pulls it inward (if gravity repelled at some distances or configurations, the Moon would spiral away, but it doesn't—it's held in orbit by attractive force); and ocean tides are high on the side facing the Moon because the Moon's gravity attracts the water creating a bulge (if gravity repelled, water would bulge away from Moon on opposite side only, but actually it bulges toward Moon showing attraction). Choice B is correct because it properly cites evidence showing only attraction: falling, orbits, tides all demonstrate gravitational attraction. Choice A uses evidence that actually shows attraction (falling toward Earth) but misinterprets it as repulsion. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions. This certainty comes from the perfect record: in all of human history, every gravitational measurement and observation has shown attraction (literally billions of observations from falling objects to planetary motions to galactic clustering), with zero counterexamples of repulsion—such overwhelming one-sided evidence strongly supports the scientific claim that gravitational forces are always attractive, which is now a fundamental principle in physics that explains phenomena from why we don't float off Earth to how the universe's large-scale structure formed through gravitational attraction pulling matter together over billions of years.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. This universal attraction occurs because mass (the source of gravity) only comes in one type (positive), unlike electric charge (can be + or -) or magnetic poles (can be N or S), so there's no 'like repels like' for gravity the way there is for charges (++ repel) or magnets (NN repel). For observational evidence: Every single observation of gravitational force shows attraction: when you drop a book, it falls down toward Earth (Earth's gravity attracts the book), never up or sideways (no gravitational repulsion pushing it away); the Moon stays in orbit around Earth because Earth's gravity continuously pulls it inward (if gravity repelled at some distances or configurations, the Moon would spiral away, but it doesn't—it's held in orbit by attractive force); and ocean tides are high on the side facing the Moon because the Moon's gravity attracts the water creating a bulge (if gravity repelled, water would bulge away from Moon on opposite side only, but actually it bulges toward Moon showing attraction). Choice A is correct because it properly cites evidence showing only attraction: tides demonstrate gravitational attraction. Choice B incorrectly claims gravitational repulsion exists or has been observed, when actually no gravitational repulsion has ever been detected in any experiment or observation. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. Unlike magnetic forces (where like poles repel: north-north repel, south-south repel), gravitational forces have no repulsive configuration—you cannot arrange masses to make them repel each other the way you can arrange magnets (both north poles facing) to create repulsion, because mass comes in only one type (all positive, no negative mass), while magnets have two pole types (N/S). Choice B is correct because it accurately explains that no matter what two objects you choose (rock, person, planet), their gravity pulls them toward each other, and we do not observe any 'same-mass repels' case like we see with magnets—this directly refutes the claim that gravity behaves like magnetism. Choice A incorrectly uses the fact that magnetic poles repel to argue that planets should repel too, missing the fundamental difference that gravity only attracts while magnetism can both attract and repel. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures regardless of composition, (2) we can rely on gravity consistently (won't suddenly repel based on configuration like magnets do). This fundamental difference exists because mass comes in only one type (all positive, no negative mass), while magnets have two pole types (N/S), and it's the existence of opposite types that allows repulsion in magnetic forces but not in gravity.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. Every single observation of gravitational force shows attraction: when you drop a book, it falls down toward Earth (Earth's gravity attracts the book), never up or sideways (no gravitational repulsion pushing it away); the Moon stays in orbit around Earth because Earth's gravity continuously pulls it inward (if gravity repelled at some distances or configurations, the Moon would spiral away, but it doesn't—it's held in orbit by attractive force); and ocean tides are high on the side facing the Moon because the Moon's gravity attracts the water creating a bulge (if gravity repelled, water would bulge away from Moon on opposite side only, but actually it bulges toward Moon showing attraction). Choice B is correct because it provides multiple clear examples of gravitational attraction: falling books show Earth attracts objects, the Moon's orbit shows Earth attracts the Moon, and tides show the Moon attracts Earth's water—all demonstrating gravity only pulls, never pushes. Choice A describes electric and magnetic behavior (repulsion between like charges/poles), not gravitational observations, and actually highlights how gravity differs from these forces by never showing repulsion. The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) we can rely on gravity consistently for everything from walking on Earth to planning space missions. If you ever see objects repelling (pushing apart), you know it's not gravity—it's either electric forces (like charges), magnetic forces (like poles), or mechanical forces (compressed spring, air pressure), but never gravitational forces.

This question tests understanding that gravitational forces are always attractive (only pull objects together, never push apart), which distinguishes gravity from electric and magnetic forces that can either attract or repel. The claim that gravitational forces are always attractive is supported by overwhelming evidence: (1) all objects fall downward toward Earth (attracted by gravity) and nothing is ever repelled upward by gravity, (2) all planets orbit their stars because gravity pulls them inward—if gravity could repel, planets would fly away from the Sun instead of orbiting, (3) tides occur because the Moon's gravity attracts Earth's oceans (water bulges toward Moon), not repels them, (4) throughout all of scientific observation and experimentation, no case of gravitational repulsion has ever been found—everything with mass attracts everything else with mass, without exception. This universal attraction occurs because mass (the source of gravity) only comes in one type (positive), unlike electric charge (can be + or -) or magnetic poles (can be N or S), so there's no 'like repels like' for gravity the way there is for charges (++ repel) or magnets (NN repel). Choice B is correct because it properly cites evidence showing only attraction: falling books, Moon's orbit, and tides all demonstrate gravitational attraction. Choice A is incorrect because it cites weightlessness in space as evidence of repulsion, when actually astronauts still experience gravitational attraction (they're in free-fall orbit, continuously falling toward Earth, not being pushed away). The always-attractive nature of gravity has profound implications: (1) gravity pulls all matter together forming structures (planets from dust clouds, stars from gas, galaxies from scattered matter), (2) objects don't fly apart spontaneously due to gravity (only other forces like electrostatic repulsion can cause that), (3) we can rely on gravity consistently (won't suddenly repel and send us flying into space—always pulls us to Earth), and (4) understanding gravity as attractive-only helps distinguish it from electric and magnetic forces in explanations and predictions. If you ever see objects repelling (pushing apart), you know it's not gravity—it's either electric forces (like charges), magnetic forces (like poles), or mechanical forces (compressed spring, air pressure), but never gravitational forces. This certainty comes from the perfect record: in all of human history, every gravitational measurement and observation has shown attraction (literally billions of observations from falling objects to planetary motions to galactic clustering), with zero counterexamples of repulsion—such overwhelming one-sided evidence strongly supports the scientific claim that gravitational forces are always attractive, which is now a fundamental principle in physics that explains phenomena from why we don't float off Earth to how the universe's large-scale structure formed through gravitational attraction pulling matter together over billions of years.