The Earth’s environment is home to millions of species : big to small , plants to animal ansd aquatic to  terrestial .Environment is not just limited to surrounding s .It includes all rthe living and non living components that exist on the earth either they are visible r invisible . The largest part of the earth is biosphere , we all live in the part of the earth called biosphnatural forces ere that sustains life . The biosphere is divided into smaller fragments of areas with similar climate and vegetation called the biome . for example aquatic biome terrestrial biome etc .A biome is the combination of several  systems. The unit of biome is called an ecosystem .

The word ‘eco’ means environment and ‘system ‘ means  the structure . Thus ecosystem represents a systematic structure of environment . In this structure , there is everything that we have around:plants , animals , microbes , sunlight , air, soil etc  They share food and energy with each other .  Ecosystem is a small unit of an environment which consists of living and non living components that exchange matter and energy . The ecosystem is automatically regulated by natural forces . Some ecosystem are simple while some are complex . Most of the ecosystem are natural while other are nade by human .and ecosystem is very very important to all of us.