What are the reasons for the variety of reptiles?

The variety of reptile species is quite large, like other types of animals. This is possible due to a long evolutionary process that gave rise to a large number of species. In the course of evolution, representatives of the population received new adaptations to the environment. Populations changed and new species appeared. The appearance of the first reptiles and their spread to different territories was the reason for their great diversity. The same thing happened with other representatives of the animal world.