Consider the following: The phenomenon of hibernation can be observed in which of the above kinds of animals? 1. Bats 2. Bears 3. Rodents

The phenomenon of hibernation, or similar states of prolonged torpor characterized by reduced metabolic activity and body temperature to conserve energy during unfavorable conditions (like winter), can be observed in various kinds of animals. 1. Bats: Many species of bats, especially those living in temperate regions where insect prey becomes scarce in winter, undergo hibernation. 2. Bears: While the state in bears is sometimes debated and called 'winter lethargy' or 'torpor' because their body temperature drop is less drastic than in smaller hibernators, it functions similarly to hibernation for energy conservation during winter. Many scientific sources consider it a form of hibernation. 3. Rodents: Many species of rodents, such as ground squirrels, marmots, chipmunks, and hamsters, are classic examples of true hibernators, exhibiting significant drops in body temperature, heart rate, and metabolic rate during winter. Therefore, hibernation or hibernation-like states can be observed in bats, bears, and rodents.