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Answer:

Aquifers are bodies of saturated rock and sediment through which water can move, and they provide 99% of our groundwater. Humans rely on aquifers for most of our drinking water. Aquifers are underground layers of rock that are saturated with water that can be brought to the surface through natural springs or by pumping. ... Groundwater moves more readily through these materials, which allows for faster pumping and other methods of extracting the water.