DENDROLOGY

Detailed explanation-1: -Most amphibians breathe through lungs and their skin. Their skin has to stay wet in order for them to absorb oxygen so they secrete mucous to keep their skin moist (If they get too dry, they cannot breathe and will die).

Detailed explanation-2: -Most amphibians undergo metamorphosis, during which they change from an aquatic animal that breathes through gills to an adult that may have gills or lungs, depending on the species.

Detailed explanation-3: -Frogs are amphibians they can live both on land as well as in water. when they are in the water they breathe with skin and when on land they breathe with their lungs.