At places, the groundwater is stored between layers of hard rock below the water table. This is known as __________.
A
a reservoir
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B
an aquifer
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C
a hard water
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D
a well water
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Solution
The correct option is B an aquifer An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand or salt). Ground water can be extracted using a water well.