Answer:
land runoff, precipitation, atmospheric deposition, drainage, seepage or hydrologic modification.
Explanation:
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Earth is composed of four main layers, starting with an inner core at the planet's center, enveloped by the outer core, mantle, and crust. The inner core is a solid sphere made of iron and nickel metals about 759 miles (1,221 kilometers) in radius.
source: nasa
Deforestation, that would be clearing the land leading to desertification
