Why is cool-down considered a part of the training process in physical education?

Correct answer: It gradually returns the body to normal state

The governing concept is recovery after exercise. During vigorous activity, heart rate, breathing rate and blood flow are elevated. Cool-down uses light movement and stretching to reduce activity gradually, supporting circulation and helping the body return toward its resting condition. Thus option A is correct. The other options describe starting activity, changing rules or an impossible effect, so they do not explain why cool-down belongs to training.