Survival of the fittest. If one organism thrives better in an enviornment and the other organism struggles, the one that is more adapted will obviously play a part in helping the less adapted organism die out. Food is a major point along with other aspects
I say D, because there are certain states that have national parks and a large tree area.
The correct answer is; the open mouth of a baby robin is seen as a sign stimulus for the female robin (parent), and that the open mouth is the impending cause for her behavior.
The reasons are many. The most major reason was the fact that they were outnumbered by the U.S.
