Most amphibians breathe with gills as larvae and with lungs as adults, and all frogs are amphibians. Given these facts, what breathes with gills as larvae and with lungs as adults. among the following options:
- Salmon.
 - Frogs.
 - parasites
 - Whales.
 - Mice.
 - a fish
 - air
 - tortoises


 

  Frogs.       