abundant rain in the Ozarks excessive pumping from wells dams on the lower Mississippi community water conservation
I gave my students this multiple choice question: Some of Earth's water is stored underground in porous rock formations known as aquifers. Which of these could use up groundwater in aquifers?

Only one answer is correct among these 4 choices:
- abundant rain in the Ozarks
- excessive pumping from wells
- dams on the lower Mississippi
- community water conservation

Could you tell me which one is correct?

excessive pumping from wells