You are presented with the question "Human longevity and reproduction are positively impacted by:" and the following answer choices: 
- aging
 - food
 - nutrients
 - gene flow
 - old age
 - exercise
 - dying young
 - reduced heat

Now knowing that exercise has a positive impact on a human 's health and prevention is key to their health, longevity, and reproduction, choose the best answer.


 

      exercise   