Same as humans, they are both mammals. Lungs.
Frogs open and close their mouths to breathe. They don't have diaphragms to help them breathe, so they use muscles in their mouth to push air into their lungs. They also use this action to help them swallow food.
we will die
We breathe it.
Because you breathe into it
When we breathe in air, our bodies use the oxygen in it for energy and release the nitrogen back into the air when we exhale.
They use them to breathe with, to get oxygen from the air.
Bats breathe through their mouths and noses.
They use a blow hole to breathe in/out air when the surface the water.
When we breathe in nitrogen, our bodies do not use it for any specific purpose. Nitrogen makes up about 78 of the air we breathe, but our bodies mainly use the oxygen in the air for important functions like producing energy.
Air of course!
Whales breathe with lungs, and fish use gills.
Animals breathe in oxygen in the air.