One of the most crucial factors in the development of fatigue appears to be a depletion of ATP. a. True
b. False

Option A

True

Explanation:

Adenosine triphosphate (ATP) is the molecule in the cells that carry energy. They help to trap the energy that is obtained during respiration and the breaking down of food, in order to release it to the cells of the living organisms when the need arises.

Once the ATP levels deplete in the body, cellular fatigue begins to occur, as the cells do not have the required energy to perform their necessary functions.

This makes the correct option to be A: True. The depletion of the ATP levels in the body causes fatigue

that is wrong, its not thymus.