Is dinosaur a reptile or amphibian?

Answer 1

Dinosaurs are considered wartmblooded reptiles. They were bird-like but bigger and unfeathered. They are not amphibians and also differ from the modern cold-blooded reptiles.

While they are still considered to be reptiles, recent fossil discoveries suggest that some dinosaurs may have been warm blooded and more closely related to birds; these dinosaurs had light, hollow bones, and may have been covered with feathers.