You are presented with the question "Smoking tobacco decreases" and the following answer choices: 
- aerobic capacity
 - growth hormone
 - Abnormal cell growth
 - Greenhouse gasses
 - survival
 - kinetic energy
 - insulin production
 - testosterone

Now knowing that smoking tobacco decreases stamina and an added benefit is increased stamina and aerobic capacity, choose the best answer.


 

 aerobic capacity        