托福口语 Task 4

Today we're going to talk about a fascinating concept in animal behavior called 'tool use.' Now, tool use isn't just about using an object to achieve a goal; it's about modifying or manipulating an object to serve a specific purpose. Many people think only primates do this, but actually, birds and even insects show remarkable examples. Let me give you two examples. First, consider the New Caledonian crow. This bird doesn't just pick up a stick; it actively shapes a twig into a hook to fish out insects from tree crevices. It even strips leaves to make the tool more effective. This shows foresight and problem-solving. Second, think about the sea otter. Otters float on their backs and use rocks to crack open shellfish. They don't just use any rock; they choose a rock that's the right size and shape, and they often keep their favorite rock under their arm for repeated use. This shows planning and preference, which are key aspects of tool use. So, the main point is that tool use is not exclusive to humans or primates and involves cognitive abilities like planning and selection.