You are presented with the question "What do frogs breathe with when they are adults?" and the following answer choices: 
- skin
 - fins
 - lungs
 - oxygen
 - gills
 - air
 - Energy
 - Gases

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


 

   lungs      