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

Fact 2: An adult frog has lungs and teeth.

Given the two facts above, answer the question "Adult frogs have what and breathe with gills as larvae?" with the following options: 
- embryos
 - a fish
 - ovaries
 - grow
 - teeth
 - survive
 - NaCl
 - oxygen


 

     teeth    