All living beings are biotic., Lithosphere is the solid crust of the Earth., Any thing that surround any living organism is called environment., Landforms are found over continents and ocean floors., The domain of water is referred as hydrosphere., The thin layer of air that surrounds the earth is called atmosphere., Interaction of all living organism is called ecosystem., On 5 June every year the world environment is celebrated., Barter system is a trade in which goods are exchanged without the use of money., Biosphere is a narrow zone where land, water and air interact.,

Environment

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