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

Fact 2: For exercise, moderate exercise such as walking is recommended.

Given the two facts above, answer the question "what is a moderate way to have a positive impact on a human 's health" with the following options: 
- Cooking
 - walking
 - high fat
 - Heart rate
 - skipping meals
 - pollution
 - sweating
 - food


 

  walking       