All of these.. Because it contains all of these characteristics
Answer:
here are some of the benefits!
Explanation:
Warming up helps prepare your body for aerobic activity. A warmup gradually revs up your cardiovascular system by raising your body temperature and increasing blood flow to your muscles.
I think it might be d. the lungs expand and contract which increases the rate of blood flow so the muscles can convert and store energy
I can help you when you post the different answers they give you if it's a multiple choice if not then I can work with that. I would really like to have the multiple choice if it's possible. If not its fine.