While in South America, you come across what you think are two groups of birds in the same location. They are nearly identical aside from their color. After years of observation, you conclude that the birds eat similar diets and share similar behaviors but do not reproduce with each other. These groups of birds appear to be an example of:A) a single biological species.
B) ring species.
C) two different species on the basis of reproductive behavior.
D) two different species on the basis of the ecological niche occupied.
E) a single ecological species.

C) two different species on the basis of reproductive behavior.

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.

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hope this you! : )

(i popped my answer into google translate so it may be a bit wonky)