Five closely related species of frogs live in ranges that overlap. Some breed in woodland ponds, some in lowland swamps, and some in streams. How do these five species of frogs remain separate and do not attempt to mate?

The diversity within the same species is what makes it not possible to reproduce, since it can have different methods of appearance and even different zones or mechanisms of reproduction since this was adapted to each particular climax.

Explanation:

Frogs that have different qualities in the same species are because they are subject to different environmental characteristics, therefore it is a way of natural adaptation.

By having different adaptation methods, this conditions that there is no cross reproduction between them.