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The advantage/s associated with water harvesting at the community level is/are

1. The ground water level increases due to recharging of wells
2. Ground water keeps the layers of soil above it moist and prevents loss of water by evaporation.
3. Ground water keeps the layers of soil above it dry and prevents loss of water by evaporation
4. Both A and B

Correct answer: Both A and B

Solution

Community water harvesting helps recharge groundwater, which raises the water table and improves well levels. That groundwater also keeps upper soil layers moist, reducing evaporation losses, so both A and B are correct.

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