Answer:
I think true if its wrong I'm sorry
I'd personally say B because a warmup will reduce injury, soreness, and get you ready. Then you have your exercise. Then the cooldown helps <span>bring the heartrate down to near-normal and to get the blood circulating freely back to the heart. Stopping abruptly could result in fainting or place undue stress on the heart.</span>
Grow and develop
Are made of many cells
Can reproduce
C. A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
