You are presented with the question "The formation of more mitochondia does what?" and the following answer choices: 
- 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

Now knowing that exercise increases a body 's strength and exercise promotes the formation of more mitochondria, choose the best answer.


 

 increases a body's strength        