Q. Which is the most stable ecosystem ?
Answer: Ocean
Notes: Ecosystem can be natural or man-made, large or small , permanent or temporary, complete or incomplete. Natural ecosystem. It is an ecosystem developed under natural conditions without any appreciable human interference. Natural ecosystem can be terrestrial (e.g., forest, desert, grassland) or aquatic (e.g., fresh water, lake, pond, river, sea). Oceans constitute the most stable ecosystem.

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