Fact 1: Hearing is used for sensing sound by animals.

Fact 2: If an animal is a dog then it is a mammal.

Given the two facts above, answer the question "Dogs use hearing for " with the following options: 
- food and shelter
 - population movement
 - sensing sound
 - circulatory systems
 - chemical messengers
 - courtship
 - support
 - it can be seen


 

   sensing sound      