what is the largest of all realms on earth
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the four realms of earth : lithosphere , hydrosphere , biosphere and atmosphere.
lithosphere : the outer most solid layer of the earth that is composed of rocks and soil is known as lithosphere.it is also called the crust of the earth.
hydrosphere:the hydrosphere contains all the water bodies in the world that cover about 71 per cent of the earth's surface.
biosphere : the biosphere is the narrow zone where the lithosphere , the hydrosphere and the atmosphere come in contact with one another.this realm contains all the living organisms found on the earth.
atmosphere : the atmosphere surrounds the earth as a layer containing a mixture of gases.it is held by the gravitational force of the earth.
The 'biogeographic realm' is the broadest and largest realm of the earth.
EXPLANATION:
It is also known as the ecozone and is characterised by the organisms that have evolved in the realm over a time period. The 'four realms' of the earth are Lithosphere, Hydrosphere, Biosphere and Atmosphere. Lithosphere contains all 'second order landforms'.
Hydrosphere covers almost 71% of the 'earth’s surface' and contains first order landforms. The atmosphere is the layer that protects the living organisms. Biosphere is where every living organisms live and survive.