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: -So, among these three animals, earthworms and frogs can respire through skin but only frogs can respire through lung and skin both.

Detailed explanation-3: -Mudpuppies, a kind of salamander, have very slimy skin just like a fish. They live in the water and their thick slime helps protect their skin. Amphibians can breathe through their skin!

Detailed explanation-4: -What are the 7 main characteristics of amphibians? Amphibians have a backbone, are cold-blooded, need a moist place to live, can breathe air through their skin, externally fertilize their eggs, eat meat, and grow legs when they mature.