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The text structure of the following passage:
Crocodiles and alligators look very much alike, but there are ways to tell them apart. The crocodile has a pointy snout, while the alligator’s snout is rounder. The crocodile weighs less than the alligator and can move faster. Both animals have an extra-long lower tooth. When the crocodile’s mouth is closed, you can see this long tooth. However, when the alligator’s mouth is closed, the tooth is hidden inside the mouth.
What is compare and contrast?