Multiple choice

Coral reefs are formed by

  1. Volcanic rocks

  2. Marine sediments

  3. Chlorine material precipitated from sea water

  4. Tiny colonial marine animals which construct limestone skeleton material
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Coral reefs and atolls are significant sub-marine features. These are formed due to accumulation and compaction of skeletons of lime secreting organisms known as coral polyps.

Keep practicing — related questions