Which of the following is/are the example of a natural ecosystem?
A natural ecosystem is an ecosystem that occurs as it would without the influence of human beings. For example terrestrial ecosystems like forests, grasslands and deserts and aquatic ecosystems like the pond, lake, estuary, ocean etc. Prairie is a large, mostly flat area of land in North America that has few trees and is covered in grasses. Agricultural farmlands, on the other hand, are man-made or artificial ecosystems.