What would have the greatest kinetic energy? A car driving down a
hill.

leaves rolling down a
hill

A ball rolling down a
hill.

A person runnin
down a hill.

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.