No, amphibians do not belong to the class Reptilia. Instead, they are classified under their own class called Amphibia.
Amphibians, which include frogs, toads, and salamanders, are a distinct group of vertebrates characterized by their unique life cycle which typically involves both aquatic and terrestrial stages. They generally start life as eggs laid in water, hatch into larval forms (like tadpoles), and later undergo metamorphosis to become adults that can live on land.
On the other hand, reptiles, which include snakes, lizards, turtles, and crocodilians, belong to a different class and are primarily characterized by their scaly skins and the ability to lay eggs on land. Although both amphibians and reptiles are part of a larger group called tetrapods (four-limbed animals), they are separate classes with distinct evolutionary histories and biological traits.