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

Fact 2: Elephants are the largest animals on land.

Given the two facts above, answer the question "What uses lungs for breathing air?" with the following options: 
- rocks
 - some mammals
 - Frogs
 - monotremes
 - humans
 - bacteria
 - elephants
 - oak trees


 

       elephants  