What is an amphibian?

Amphibians are a cold blooded vertebrate animal of a class comprises of frogs, toads, and salamanders. They have aquatic gill breathing larval stage follow by a terrestrial lung breathing adult stage.

a cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, and salamanders and they have gills and eventually breath through their lungs when an adult.

Explanation:

answer; talc and gypsum;