托福口语 Task 4

Today we're going to talk about the concept of 'behavioral adaptation' in animals, specifically how some species have developed unique ways to cope with extreme environmental conditions. One key idea is that these adaptations are not just physical but also involve changes in behavior that help survival. Let me give you two examples. First, consider the desert kangaroo rat. It never drinks water in its lifetime. Instead, it gets all its moisture from the seeds it eats and has adapted its behavior to be nocturnal, staying in its cool burrow during the scorching day. This reduces water loss. Second, the African lungfish lives in ponds that dry up seasonally. When the water disappears, it burrows into the mud, secretes a mucus cocoon, and enters a state of estivation, slowing its metabolism dramatically. This behavioral dormancy allows it to survive for months until the rains return. So, both examples show that behavioral changes are crucial for survival in harsh habitats.