托福口语 Task 4

Today, we're going to talk about a fascinating phenomenon in animal behavior called 'tool use.' Now, many people think tool use is unique to humans, but in fact, several animal species have been observed using objects as tools to achieve specific goals. The key point is that this behavior isn't just instinctive; it often involves problem-solving and learning. Let me give you two clear examples. First, consider the sea otter. Sea otters float on their backs and use rocks to crack open hard-shelled clams. They will often keep a favorite rock tucked under their arm and use it repeatedly, which shows they can select and retain a tool for future use. Second, think about the New Caledonian crow. These crows are known for crafting hooks from twigs and leaves to extract insects from tree crevices. Interestingly, young crows learn this technique by observing adults, not just by instinct. These examples illustrate that tool use in animals is a learned, adaptive behavior that helps them survive in their environments.