A: Do you know what animal is the biggest in the world?
B: Maybe it’s the elephant, right?
A: Elephants are indeed very large. They are 3-4.5 meters tall in general, and their legs just look like four pillars, so wide and so tall. But they are not the biggest. Elephant is the biggest animal on the land. B: You mean that there are other animals much bigger than elephant, but they don’t live on the land.
A: Yes.
B: I know. It couldn’t be some birds flying in the air. It’s would be incredible. … En, I recalled that it’s the whale, Is it right?
A: Yes. Most whales are enormous. One kind, the blue whale, is the largest animal that has ever lived. 
Blue whales can grow up to 30 meters long and weigh over 135 metric tons, much bigger than elephants.
B: My god, so big fish!
A: No, they look much like fish, but they are not fish. They belong to the group of animals called mammals. Like other mammals, whales have a highly developed brain and are among the most behaviorally complex of all animals.
B: Thank you. You know that the shape between them are so the same.
A: Let’s go to the library to find more knowledge about them.
B: Ok, Let’s go.

A: Do you know what animal is the biggest in the world?
B: Maybe it’s the elephant, right?
A: Elephants are indeed very large. They are 3-4.5 meters tall in general, and their legs just look like four pillars, so wide and so tall. But they are not the biggest. Elephant is the biggest animal on the land. B: You mean that there are other animals much bigger than elephant, but they don’t live on the land.
A: Yes.
B: I know. It couldn’t be some birds flying in the air. It’s would be incredible. … En, I recalled that it’s the whale, Is it right?
A: Yes. Most whales are enormous. One kind, the blue whale, is the largest animal that has ever lived. 
Blue whales can grow up to 30 meters long and weigh over 135 metric tons, much bigger than elephants.
B: My god, so big fish!
A: No, they look much like fish, but they are not fish. They belong to the group of animals called mammals. Like other mammals, whales have a highly developed brain and are among the most behaviorally complex of all animals.
B: Thank you. You know that the shape between them are so the same.
A: Let’s go to the library to find more knowledge about them.
B: Ok, Let’s go.