Question

All objects in the universe are attracted to each other by the force of. A. effort

B. friction
C. inertia
D. gravity*

Answer 1

So, I noticed that somebody rated the other answer here 1 star. But, if you really can't get it, (which doesn't make sense because the answer is literally in it) the answer is gravity. Which would make the answer D. gravity

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Answer 2

It encapsulates the idea that all the particles of matter in the universe attract each other through the force of gravity – Newton's law tells us how strong that attraction is. ...

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your answer