The human body is formed by internal and external parts. External parts of the body are, for instance, the hands, the skin, the hair, or the feet. ...

The human body is formed by internal and external parts. External parts of the body are, for instance, the hands, the skin, the hair, or the feet. Nevertheless, these parts of the body, are depending on internal parts. The internal parts of the body grant good health and locomotion, thinking, and living conditions. Check the CORRECT answer where only internal parts of the body appear:

A Tongue - bones - eyelid.
B Bladder - heart - lips.
C Brain - heart - lungs.
D Muscles - kidney - toe.