Why does a frog stick out its head above the surface of the water? How long does it smear under water?

1.Why does a frog stick out its head above the surface of the water? 2.How long does it smear under water? 3.Does a fish stick its head out of the water like a frog? 4.How long can it stay under water? 5.Why does a pond snake rise from the water along How long can a pond snail stay under water?

1) Since she is an amphibian, she needs air
2) Quite a long time up to a month or more
3) Maybe, but she generally does not need this, because fish get the oxygen they need for life from water
4) All my life
5) In order to breathe and eat
6) A couple of hours, because it rises to the surface 5-9 times a day