Answer: Animals commonly called reptiles, amphibians, birds, and mammals are all tetrapods-a term that means "four feet".
Explanation: Tetrapods are a group of vertebrates that namely;
1. amphibians
2. reptiles
3. birds
4. mammals.
Tetrapods are made up of all living land vertebrates, and some vertebrates who once lived on land. Such vertebrates have adapted to live in seas and oceans Examples of such vertebrates are
1. whales
2. dolphins
3. seals
4. sea turtles and many more
One of the key features of tetrapods is that they have four limbs or, their ancestors had four limbs. Are known as tetrapods