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

Fact 2: Cats are Mammals that Shed Dogs are Mammals that Wag their tails.

Given the two facts above, answer the question "Why do dogs play?" with the following options: 
- To keep their body heat.
 - To win a fight
 - it keeps an organism warm
 - increases a body's strength
 - To learn to behave
 - allow growth
 - To become dominant
 - To spend time alone


 

     To learn to behave    