They resorb them and develop lungs.
Yes, especially in the larval stage. Most species lose their gills when they become an adult, but there are some exceptions.
They grow lungs, and lose their gills.
Young frogs, or tadpoles, breathe underwater using gills. Then they grow lungs and lose their gills. As adults, they breathe air using their lungs.
yes
no
they breathe with gills
A amphibian has neither lungs or gills
yes
Snakes are "Reptiles" not to be confused with "Amphibians"
hippos are not amphibians they are mammals because they do not have gills and they do not start of as larva
They breathe with gills and lungs
Amphibians