Ans: Ecosystem
The self-sufficient unit of an environment that is formed as a result of interactions between its biofic community and the abiotic components is known as art ecosystem.
Components of Ecosystem
An ecosystem comprises of two basic parts i.e. abiotic components and "biotic components.
i) Abiotic .components: The abiotic components include the non-living factors present in ecosystem. The important non-living factors are light, air, water, soil and the basic elements and compounds.
ii)Biotic components: The biotic components comprise the living part (organisms) of the ecosystem. Biotic components are further classified as producers, consumers and decomposers. ,