Which of the following is/are the example for 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 a pond, lake, estuary, ocean etc. Prairie is a large, plains in North America that has few trees and is covered in grasses. Agricultural farmlands, on the other hand, are man-made or artificial ecosystems.