Fact 1: Playing is just one of many ways that mammals and other animals learn how to behave.

Fact 2: Dogs like to play fetch.

Given the two facts above, answer the question "Fetch is one way that what learns how to behave?" with the following options: 
- Bats
 - otters
 - Man
 - cooking
 - dogs
 - skating
 - humans
 - fishing


 

     dogs    