Question

Which is an example of a population migrating in response to environmental stress?
A. A polar bear needs a wide territory to find sufficient prey.
B. Bats sleep during the day and fly from their shelters at night.
C. A cactus species distribution changes over time when the average temperature in its former habitat becomes too high.
D. Honeybees pollinate bluebonnet flowers, helping the bluebonnets thrive in their native environment.