Bears are large mammals found in various habitats across the Northern Hemisphere. Many bear species, like brown bears, hibernate during the winter months. This means they enter a deep sleep to save energy when food is scarce. Last winter, the cold was exceptionally harsh, so bears had to prepare even more carefully for their hibernation period.
Why do many bear species hibernate during winter?
A) To find new habitats.
B) To save energy when food is scarce.
C) To avoid warmer temperatures.
D) To hunt other hibernating animals.