Question

multiple - choice question
what are the variations in the frogs?
being able to breed with each other
the skin color - brown and green
passing down their dna to other frogs

Explanation:

Variations refer to differences in traits among individuals of a species. Skin - color differences like brown and green in frogs are examples of such variations. The ability to breed with each other is a characteristic of the same species, not a variation. Passing down DNA is a general biological process, not a variation.

Answer:

the skin color - brown and green