Question

why are muscles able to contract and relax to bring about movement​

Answer 1

Answer:

hey buddy .........☺

ur ans is...........⤵

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Muscles are special fibres in the body that contract and relax to cause movements. Movement is caused by the contraction and relaxation of muscles. When one muscle contracts, the other relaxes and this causes displacement. The muscles of our heart are called involuntary muscles as they don't work according to our will.

Answer 2

Answer:

skeletal muscle

Explanation:

because it use stable our body