Fact 1: Lungs are used for breathing air by land animals.

Fact 2: Elephants are the largest land animals.

Given the two facts above, answer the question "what uses lungs to breathe air?" with the following options: 
- insects
 - plants
 - humans
 - some mammals
 - oxygen
 - elephants
 - monotremes
 - Frogs


 

      elephants   