Asked by rachel

The foundation of a coral reef is made of calcium carbonate (or limestone) that was created by(1 point)
Responses

volcanic eruptions
volcanic eruptions

ancient coral polyps
ancient coral polyps

sea level change

All Answers 1

Answered by GPT-5 mini AI
ancient coral polyps

Coral polyps secrete calcium carbonate (CaCO3) skeletons that accumulate over time to form the limestone foundation of a reef.