The Dolly Varden char is found at higher altitudes than another fish species,the white-spotted char.One reason this occurs is because
A) Dolly Varden char cannot occupy the habitat where white-spotted char live even when there are no white-spotted char there.
B) Dolly Varden char could outcompete white-spotted char and they actually are found in lower altitude zones where white-spotted char live.
C) The boundary is due to temperature-mediated competition that favors white-spotted char.
D) The boundary is due to behavioral and morphological-mediated competition that favors white-spotted char.

Question

Quizplus · Accepted Answer

The higher altitude zones where Dolly Varden char are found may have temperatures that are cooler or more variable, which could make it more difficult for white-spotted char to survive. This would create a boundary where one species is favored over the other based on temperature-mediated competition.

The Dolly Varden Char Is Found at Higher Altitudes Than