Which of these could be BEST described as a behavioral response to changes in the environment of an organism?
A) a wolf hunts rabbits for food during a long, cold winter
B) a cell uses energy in the form of ATP to produce protein molecules
C) a reptile moves from a sunny rock to a shady location during the hottest part of the day
D) a plant takes in water through its root system to provide necessary materials for photosynthesis