Teacher: Alright, class. Today, I want to teach you that nature gives everyone equal opportunities and it's up to us to make our own destiny. To explain this, I have brought three containers. Student 1: What's in the containers, teacher? Teacher: In the first container, there's a potato. In the second one, there's an egg. And in the third one, there are tea leaves. Student 2: What are we going to do with them? Teacher: We'll boil them in water and see what happens. (Student 3 brings water and the teacher puts the containers on the gas stove.) Student 4: But how will this help us understand the concept? Teacher: Just wait and watch. (20 minutes later, the teacher takes out the containers.) Teacher: Now, let's take a closer look at these containers. Student 5: I still don't understand. Teacher: Okay, let me show you. (To a student) Please touch the potato. (Student touches the potato) Teacher: You see, it was hard before but now it's soft. This means that ...