A.
The endurance of an athlete is dependent on his or her body's ability to uptake oxygen efficiently, a task carried out by the red blood cells.
The four leading causes of death in the united states are :
1. Heart Disease
Could e prevented by doing regular cardio activity
2. Cancer
Avoid smoking. Avoid exposing yourself to sunlight without sun screen
3. Stroke
could be prevented by eating less cholesterol
4. Accidents
Could be prevented by following regulations and not exposing yourself to alcohol before driving
hope this helps
That would be rugby. Hope that helps!
