Answer: Option D
Explanation:
Muscles are the specialized cells in the body which helps in the movement of the body. The muscle cells of the body helps the body in performing various functions such as moving, walking, sitting, bending et cetera.
The muscles cells adds flexibility to the body as it covers the bones and helps in the movement of the body.
The movements in the body is very free and flexible. It feels no stress in the movements of the hands, legs and other parts of the body.
