Multiple choice

The most diverse ecosystem on Earth is

  1. Agroecosystem

  2. Aquatic ecosystem

  3. Coral reefs

  4. Human ecosystems
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Often called “rainforests of the sea”, coral reefs forms the most diverse ecosystems on Earth. Coral reefs are underwater structures made from calcium carbonate secreted by corals. Corals are colonies of tiny living animals found in marine waters that contain few nutrients.

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