Question

__________________ helps in the movement of bones by contraction and relaxation(5 class question which is asked by my bro)​

Answer 1

Answer:

Muscles is the right answer for my little brother

Answer 2

Movements of the body are brought about by the harmonious contraction and relaxation of selected muscles. ... These are carried out by the skeletal muscles of the trunk and limbs. Skeletal muscles are attached to bones and produce movement at the joints.