Answer: C. balancing the amount of energy that is taken in with the amount of energy that is released by the body.
Step-by-step explanation:
In physical fitness the composition of the body can be described as the percentage of the water, bone, protein, fat and muscle mass in the body of a human.
A good body composition is attained when the optimal regulation or balance of the amount of energy taken inside the body in the form of food and the amount of energy is released from the body by respiration, excretion and by other means.