Answer:
C) two different species on the basis of reproductive behavior.
Step-by-step explanation:
The two groups of birds have the same color and also share the same food resources and love together in the same habitat. However, these two groups of birds do not interbreed with each other. When two organisms do not interbreed and are not able to produce a viable and fertile progeny, they are said to be of two different species. The criteria is reproductive isolation that does not allow the members of two different biological species to interbreed. This makes the two groups of birds two different species on the basis of their reproductive behavior.