The correct option is C Frog
Amphibians are animals that live part of their lives in water and part on land. These are called as the amphibians. They are vertebrates and are also ectothermic. They cannot regulate their own body heat, so they depend on sunlight to become warm and active. Amphibians also cannot cool down on their own, so if they get too hot, they have to find a burrow or some other shade. In cold weather, amphibians tend to be sluggish and do not move around much. A frog is a good example, starting out as a tadpole with gills to breathe underwater and a tail to swim with. As the young frog gets older, it develops lungs, legs and a different mouth. Its eyes also change position, and it loses its tail. At this point, it is an adult frog and spends most of its time hopping on land rather than swimming like a fish in the water. Snake, crocodile and whale are not amphibians.