Reading Comprehension (RC) | Re: Frederick Snyder proposed the idea that rapid eye movement (REM) sleep

The passage only says REM is a state of much neural activity and that it helps ready an animal to escape once awake should it be attacked by a predator. Even if we assume that REM (and therefore higher neural activity) makes animals perceptive of surrounding environments, we cannot conclude that increased neural activity *will* sharpen their perception of surrounding environments.