Which of the following is an example of an aquatic ecosystem?

• A. Coral reef
• B. Desert
• C. Tundra
• D. Temperate deciduous forest

Answer: (A)

Verified step by step guidance

1. Understand what an aquatic ecosystem is: it is a water-based environment where organisms live, such as oceans, lakes, rivers, and coral reefs.
2. Review each option and identify whether it is primarily water-based or land-based.
3. Recognize that a coral reef is a marine ecosystem found in ocean waters, making it an aquatic ecosystem.
4. Note that desert, tundra, and temperate deciduous forest are terrestrial ecosystems, meaning they are land-based and not aquatic.
5. Conclude that among the given options, the coral reef is the example of an aquatic ecosystem.