<h3>Answer:</h3><h2>C. Helps increase stamina when exercising. .</h2><h3>Explanation:</h3>
The purpose of cool down exercises is to reduce the heart rate at a very controlled pace. This regulation of the heartbeat allows the body to receive oxygenated blood at a gradually slower pace till it is accustomed to the lower heartbeat, as opposed to a sudden decrease in the heartbeat, which would cause movement of blood away from heart thereby resulting in lightheadedness.