Fact 1: Exercise has a positive impact on a human 's health.

Fact 2: Exercise Regular exercise is a sleep promoter.

Given the two facts above, answer the question "What may improve health?" with the following options: 
- Enzymes
 - sleep
 - food
 - Lift
 - fats
 - insomnia
 - hunger
 - loud noises


 

  sleep       