When some birds mature, they migrate long distances to their breeding grounds or to escape harsh weather. A signal for this type of behavior is often:
A) a conditioned stimulus.
B) day length.
C) negative reinforcement.
D) a sign stimulus.
E) territoriality.

Question

Quizplus · Accepted Answer

Day length, or photoperiod, is a common environmental cue that triggers migration in birds, signaling changes in seasons and prompting them to move to breeding grounds or escape harsh weather.

When Some Birds Mature, They Migrate Long Distances to Their