The correct option is
A A natural ecosystem
The correct option is (A)
Explanation of the correct option:
- A natural ecosystem is a community of living and non-living organisms that interact together as a combined unit and live freely.
- It exists naturally and is not created by man.
Explanation of the incorrect options:
Option B
- Biome is the community of plants and animals that occur naturally and share common characteristics.
Option C
- An artificial ecosystem is a man-made ecosystem. Example- An Aquarium.
Option D
- A community of plants and animals only is a Biome.
Final Answer: A pond is a natural ecosystem.