What's the advantage of the teacher asking us to finish our homework before eating?

Because I am hungry, I will speed up my homework, so I can think quickly and finish my homework. But I suggest you eat something before you do your homework.

You must be in a bad state when you are hungry. When you are hungry, you will only be hungry with all your heart, and you will not think about other aspects. In other words, if you think about it at this time, you will be unhappy. Only by wholeheartedly can a person think better and make his mind think faster. If he is hungry, it will only interfere with his thinking and make him think more about how to fill his stomach and how to make himself less hungry and uncomfortable. So this definitely doesn't exist. Hunger won't make your thinking faster, it will only make your thinking more chaotic.