In her science class, Jenn is asked to explain the unusual behavior of the large blue caterpillar. After hatching, the large blue caterpillar falls to the ground to be carried away by a red ant. The caterpillar lives among the ants until it matures into a butterfly. Then the ants protect it until it is ready to fly. Which of the following provides the best explanation for this behavior? A :
It is motivated by external incentive.

B :
It is motivated by drive-reduction.

C :
It is motivated by the desire for an optimal state of arousal.

D :
It is instinctive.