You are presented with the question "What can breathe with gills as larvae and with lungs as adults?" and the following answer choices: 
- humans
 - viruses
 - a fish
 - animals
 - bats
 - frogs
 - bacteria
 - air

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   