how does the muscular system help humans maintain posture?\nmuscles continually align themselves vertically…

how does the muscular system help humans maintain posture?\nmuscles continually align themselves vertically to help maintain posture.\nmuscles continually push bones to be straight.\nmuscles constantly contract to help fight gravity.\nmuscles constantly contract to help work with gravity.

how does the muscular system help humans maintain posture?\nmuscles continually align themselves vertically to help maintain posture.\nmuscles continually push bones to be straight.\nmuscles constantly contract to help fight gravity.\nmuscles constantly contract to help work with gravity.

Answer

Answer:

Muscles constantly contract to help fight gravity.

Brief Explanation:

The muscular system maintains posture by constantly contracting muscles to counter - act the pull of gravity. Muscles don't align vertically in a way that directly maintains posture as described in the first option, and they don't push bones to be straight in the way stated in the second option. Working with gravity wouldn't help maintain an upright posture; instead, muscles must fight against it.