Explain what the biosphere is

Explanation:

Natural vegetation and wildlife exist only  in the narrow zone of contact between the  lithosphere, hydrosphere and atmosphere that  we call biosphere. In the biosphere living beings  are inter-related and interdependent on each  other for survival. This life supporting system  is known as the ecosystem.

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a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

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explanation: