Concept:Groundwater is recharged by rainwater seeping into the earth. Wells dry up when recharge is reduced and extraction exceeds recharge.
Explanation:Reason A: Ponds that collected rainwater are gone, so less water seeps into the ground. This reduces groundwater – correct.
Reason B: Coal tar or cement cover the soil, blocking rainwater from soaking in. This lowers the water table – correct.
Reason C: Taps in houses use piped water from reservoirs, not directly from wells. This does not cause wells to dry up – incorrect.
Reason D: Electric motor pumps draw out large amounts of underground water faster than natural replenishment. This depletes the water level – correct.
Hence the three correct reasons are A, B, and D.
Answer:Option C: A, B, and D.