Which of the following activities belongs on the top of the physical activity pyramid?
a. playing video games
b. calisthenics
c. sprinting
d. running

The activities which belong on the top of the physical activity pyramid would be plying video games - a. 

The reason for this is that we should devote little time to playing video games and hence the playing video game activity as a physical activity being on top of the physical activity pyramid. 

The activities which belong on the top of the physical activity pyramid would be plying video games - a. 

The reason for this is that we should devote little time to playing video games and hence the playing video game activity as a physical activity being on top of the physical activity pyramid. 

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1.controls blood flow2.controls oxygen flow3.carries oxygen rich blood to veins