You are presented with the question "What breathes with gills as larvae and with lungs as adults." and the following answer choices: 
- Salmon.
 - Frogs.
 - parasites
 - Whales.
 - Mice.
 - a fish
 - air
 - tortoises

Now knowing that most amphibians breathe with gills as larvae and with lungs as adults and all frogs are amphibians, choose the best answer.


 

  Frogs.       