Friction causes an object to lose energy.
Byproducts of friction friction is a force acting against motion.
 force acting against motion causes an object to lose energy.
Force acting against motion causes what?

A) Object to lose energy.
B) depress neuronal excitability
C) body temperature reduces
D) kinetic energy
E) heat production
F) heat is produced
G) heat the body
H) a lot of human deaths