Question

movement of the human body are produced by the contractio and relaxation of
(a) muscles
(b) blood
(c) bones
(d) skull
​

Answer 1

Answer:

Muscles

Explanation:

As certain muscles have the ability to contract and relax

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Answer 2

Answer:

Your answer is : (a)

Movement of the human body are produced by the contraction and relaxation of muscles.

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