Fact 1: Exercise increases a body 's strength.

Fact 2: Exercise promotes the formation of more mitochondria.

Given the two facts above, answer the question "The formation of more mitochondia does what?" with the following options: 
- increases a body's strength
 - lowered energy cost
 - absorb light energy
 - Plant growth is reduced
 - They grow better
 - to move people
 - Help plants grow
 - duplicate itself


 

 increases a body's strength        