同学你好，该知识点来自沪江网校《新版法语零起点至C1流利（0-C1）【年中特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

Hello madam, we use the definite article les to express the concept of poule as a whole, because we want to know why hens can lay eggs, we regard hens as a general concept, so we use definite article here. If we use the indefinite article, it means that some hens can lay eggs, but in fact, all hens can lay eggs.