When I saw the word "water planet" in the book, I thought; Why is the earth blue? What is the blue thing on the earth? I look down with these questions. Oh, the white thing is clouds, and the blue place is the sea. But what's under the sea? I looked down carefully, and it turned out that there were volcanoes and plains under the sea. How did the mainland come into being? I see, it turns out that the curved and protruding part in the middle of the seabed is the ridge. When the ridge reaches a certain height, it will protrude out of the sea to form an island.
Ah, earth, how beautiful and magical you are. In order to explore more of your mysteries, you will become an earth scientist when you grow up.