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  • Environmental Science
  • Coral reefs are formed by ___________.
Multiple choice

Coral reefs are formed by ___________.

  1. diatoms

  2. zooplanktons

  3. polyps

  4. algae

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Coral reefs are massive underwater structures built by colonies of tiny animals called coral polyps that secrete calcium carbonate.

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