The statement that selective pressure from wolves makes brown fur an advantageous trait would depend on the specific ecological context and environment in which the wolves and the prey species exist.
In general, selective pressure from predators like wolves can favor traits that enhance survival. If brown fur helps prey animals (like rabbits or deer) blend into their environment, making them less visible to wolves, then this trait could indeed be advantageous. Natural selection may favor individuals with brown fur if it provides better camouflage, leading to higher survival rates and more offspring.
However, if the environment changes or if wolves are hunting in a way that does not favor brown fur (for example, if the environment is primarily rocky or snowy), then the advantage of having brown fur could be diminished or reversed.
In sum, the truth of the statement is context-dependent and would require information about the specific habitat and prey species in question.