Why is this the answer?

The answer is bell because this riddle is a very clever way to describe the shape of a bell and exactly how you make it ring to hear its beautiful sound. This puzzle uses familiar objects to help you picture this musical instrument in a brand new way. Let us look closely at the first clue: "Round as a button, deep as a well." Think about a little button on your favorite shirt. It is a small, perfect circle. If you look at the bottom opening of a big church bell, that edge is shaped just like a giant, round button. The word "round" describes the bell's wide, circular opening. Next, the riddle says "deep as a well." A well is a deep, hollow space in the ground where people get water. A bell is also very hollow inside, like a giant upside-down cup that is deep. This hollow, deep shape is incredibly important. When the bell is hit, that open space helps the sound get bigger and louder so people can hear its cheerful sound all across a town or neighborhood. Now for the most important clue: "If you want me to talk, you must first pull my tail." Of course, a bell cannot truly talk like a person, but when the riddle says "talk," it means to make its wonderful ringing sound. Inside a big bell, there is a separate piece of metal that hangs down and swings back and forth. This part is called the clapper. The clapper is usually connected to a strong rope or a long chain that hangs outside and can be pulled. That long rope or chain is the bell's clever "tail." To make the bell ring, or "talk," someone has to grab that "tail" and give it a strong tug. That pull makes the clapper swing and hit the bronze or metal sides of the bell, and *ding-dong*, the beautiful sound rings out! All the clues in this riddle fit the bell perfectly, making it a fun word picture for this simple yet wonderful object.