托福口语 Task 3

In biology, the term “behavioral adaptation” refers to an action or series of actions that an organism performs to improve its chances of survival and reproduction in its environment. Unlike physical adaptations, which are structural, behavioral adaptations are learned or instinctive responses to environmental challenges. These behaviors often enable animals to cope with changes in food availability, predation risk, or climate conditions. Scientists study such behaviors to understand how species adjust to their habitats over time.

Professor: Let me give you a concrete example from a study on elephants in Africa. During the dry season, water becomes scarce, and elephant herds often need to travel long distances to find it. Researchers noticed that older female elephants, the matriarchs, remember specific routes to distant watering holes that they visited years ago. When the usual water sources dry up, the matriarch leads the herd along these remembered paths, sometimes covering many miles. This behavior—using memory to guide the group to water—is not innate but learned over years of experience. It directly increases the herd’s survival because without it, younger elephants might wander aimlessly and die of dehydration. So, this is a clear behavioral adaptation: a learned action that helps the species cope with environmental stress.