Question

Dr. Harris believes that the fur thickness of a specific rabbit species is directly related to the outside temperature of the rabbit's habitat. Other scientists in his field believe that the fur thickness of this species of rabbit is actually determined by the amount of sunlight that the rabbit is exposed to daily.

Dr. Harris performs an experiment to test whether temperature or sunlight affects fur thickness in this species of rabbit. Which of the following is true about the results of Dr. Harris's experiment?