Fact 1: Most amphibians breathe with gills as larvae and with lungs as adults.

Fact 2: All frogs are amphibians.

Given the two facts above, answer the question "What breathes with gills as larvae and with lungs as adults." with the following options: 
- Salmon.
 - Frogs.
 - parasites
 - Whales.
 - Mice.
 - a fish
 - air
 - tortoises


 

  Frogs.       