Compare the auricles of cats, rabbits, elephants and other animals, and talk about the benefits of flexible rotation of animal auricles.

This is the result of long-term evolution. The bigger the auricle, the more sound waves it receives, so as to better understand the changes in the environment and survive better. For example, cats should catch prey, rabbits should be alert to natural enemies, and elephants' ears are actually used to fan the wind, because they are large and have a lot of heat energy and live in the tropics.