PLEASE HELP ME OUT WITH THIS QUESTION PLEASE AND THANK YOU (science)

Why do skeletal muscles work in pairs?

One tightens and the othe relaxes to make the bones move.

Multiple muscles have to tighten to make joints move.

They cancel each other out.

Bones are resistant to movement.
(no guessing please☆)

2.Multiple muscles have to tighten to make joints move.

HOPE THIS HELPS IF THIS IS RIGHT CAN YOU MARK ME BRAINLIEST?

no the answer is c only objects touching the earth's surface can be acted upon by an outside force

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