Shallow pumping wells can often supply drinking water at a very low cost, but have a greater risk of contamination compared to deeper wells. Why?

Question

Responses
A shallow wells are cheapshallow wells are cheap
B shallow wells easily dry upshallow wells easily dry up
C shallow wells fill up with rain watershallow wells fill up with rain water
D surface impurities easily reach the shallow water source

Answer 1

The correct response is:

D surface impurities easily reach the shallow water source.

Shallow pumping wells are more susceptible to contamination because they are closer to the surface, where pollutants and surface impurities can easily enter the water supply.