Answer:
They have helped nearby societies because they provided them with a sufficient and reliable water source. This allows them to get enough drinking water and allow them to easily grow their agriculture.
Answer: d. North and South America
Explanation: North and South America have both suffered from extreme soil erosion more so than other countries.
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The answer is either B or D. Letter A doesn't make sense and letter C isn't right either because you need rainfall to have fertile plains.
Answer:
Explanation:Destruction of natural vegetation is primarily caused by deforestation. Other major causes are wildfire and over-exploitation. Deforestation not only occurs as a result of firewood extraction by the local population but also as a result of the creation of arable as well as pastoral land.