Colorful coral reefs teemed with life.
Meaning: The coral reefs were full of different kinds of plants and animals, and they were all very colorful.
Choice of Words: Colorful means having many different colors. Coral reefs are underwater structures made of coral, which are tiny animals that secrete a hard outer skeleton. Teemed means was full of or crowded with. This sentence describes the vibrant and diverse life found in coral reefs.
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