land,soil and water resource
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Explanation:
Land covers about 30% of the total area of the earth’s surface.
Due to variations in topography, all parts of the land may not be habitable.
90% of the world population lives only on 30% of the land area.
The remaining 70% of the land is either sparsely populated or uninhabited.
Plains and river valleys are densely populated because they are suitable for agriculture.
On the other hand, steep slopes and water logged areas are sparsely populated.
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