The answer is (d) ground water.
Explanation: Wells are built by digging into the ground to tap into groundwater. Groundwater is the water that exists beneath the Earth’s surface, and it’s the source of water for wells.
Why other options are incorrect:
(a) pond water:
Ponds are surface water bodies and do not directly feed wells. They can, however, be indirectly affected by groundwater levels.
(b) lake water:
Similar to ponds, lakes are surface water bodies and are not the primary source of water for wells.
(c) rain water:
While rainwater is essential for replenishing groundwater, it is not the direct source of water for wells. Rainwater first needs to seep into the ground and become groundwater before wells can access it.
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