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

Fact 2: Sound waves enter the ear, and are then amplified.

Given the two facts above, answer the question "What uses ears to hear?" with the following options: 
- Stereos
 - humans
 - TVs
 - Animals
 - Mammal
 - organisms
 - pigeons
 - Plants


 

    Animals     