Cooling down after a workout raise your heart rate increase your flexibility raise your body temperature decrease your appetite

None of the alternatives.

Explanation:

Cooling down after a workout is important because it keeps your blood circulating.

The idea of “cooling down” the body becomes even more important after very intense and stressful sessions - resistance, intense cardio, HIITs and the like are good examples.  When you exercise, the heart pumps much more blood through your body than at rest. The heart rate rises and the veins that carry blood to the muscles dilate, letting blood flow.

While you are moving, the muscles help pump blood back to the heart each time they contract - experts call this the "second heart." But if you suddenly stop moving, interrupting the exercise, you "turn off" this "second heart." Your heart will keep pumping a lot of blood out of it, as if you are still training, but now with no help getting it back.

The result is that it can cause dizziness and even fainting.

If you cool down you avoid this kind of problem. It helps keep the “second heart” active for a few moments until blood flow returns to normal and the heart no longer needs help.

answer; the above statement is (true);