Which of the following is a man-made aquatic habitat?

• A. Coral reef
• B. Estuary
• C. Wetland
• D. Reservoir

Answer: (D)

Verified step by step guidance

1. Understand the concept of aquatic habitats: Aquatic habitats are environments in water where organisms live. These can be natural or man-made.
2. Review the options provided: Coral reef, estuary, wetland, and reservoir. Identify which of these are naturally occurring and which are created by humans.
3. Coral reefs are natural structures formed by coral organisms in marine environments. Estuaries are natural areas where freshwater meets saltwater, and wetlands are natural ecosystems saturated with water. These are all naturally occurring habitats.
4. Reservoirs, on the other hand, are artificial water bodies created by humans, typically by constructing dams to store water for purposes such as irrigation, drinking water, or hydroelectric power generation.
5. Conclude that the correct answer is 'Reservoir' because it is the only man-made aquatic habitat among the options provided.