HibernationAnimals have many ways to deal with cold weather. Humans use heaters in the homes and wear jackets. Birds fly south to find warmer winter weather. Some animals dig in and wait for spring. To protect themselves, they go into a kind of sleep. That sleep is called hibernation. It keeps the animals from starving in the winter. One animal that hibernates is the bear. During the winter, the bear goes into a caveto sleep. While it sleeps, the bear’s breathing and heartbeat slow down. This lets the bear save energy. The bear can go without food for the whole hibernation. The bear does not grow during hibernation. When spring comes, the bear wakes up and goes on with its normal life.3. This passage is mostly aboutA. why animals need to keep warm in the winter. B. how the weather changes throughout the year. C. why birds fly south to find warmer weather. D. how humans and some animals adapt tothe winter.4. Which statement supportsthe main idea of the passage?A. Birds fly south to find warmer weather. B. Humans use heaters in their homes and wear jackets. C. The bear can go without food for the whole hibernation. D. All the above.