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: 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.