Answer:
Natural Ecosystem
A natural ecosystem is a community of living and non-living entities and occurs freely in nature. Every component interacts together as a combined unit through physical, chemical and biological processes. The discriminating factor of natural ecosystems from other ecosystems is that they are completely natural. Their interactions in no way are influenced by human activity as seen in the case of artificial ecosystems. The components of natural ecosystems that bring about these interactions are soil, sunlight, air, water, plants, animals and microorganisms. Each of these factors of the ecosystem is associated either directly or indirectly. For example, a fluctuation in the temperature levels affects the growth of plants.
Explanation:
It's just my own understanding of natural ecosystem.