Detailed Explanation:

✅ Statement 1 – Correct: Bats undergo hibernation during winter months when insect prey becomes scarce, entering torpor to conserve energy.

✅ Statement 2 – Correct: Bears (brown bears, black bears, polar bears) are well-known hibernators, though they experience a lighter form of dormancy compared to true hibernators.

✅ Statement 3 – Correct: Many rodent species like groundhogs, chipmunks, ground squirrels are true hibernators with drastically reduced body temperature and metabolic rate.