Eastern tent caterpillars live in sizable groups in silk nests, or tents, which they construct in cherry trees. They are among the first insects to become active in the spring, emerging very early in the season—a time when daily temperature fluctuates from freezing to very hot. Observing a colony over the course of a day, you observe striking differences in group behavior: Early in the morning the black caterpillars rest in a tightly packed group on the east-facing surface of the tent. In midafternoon, the group0 is found on the ten undersurface, each caterpillar individually hanging from the tent by just a few of its legs. Propose a hypothesis to explain this behavior. How could you test your hypothesis?