I believe it is the third option, hope this helped
Answer: D: surface water; reservoirs
there has been a lack of surface water, which is the water used for drinking, so theyre building reservoirs for storing water to be used at a later date
Explanation:
The elite were wealthy farmers or urban merchants. in the South, they were wealthy planters. Hope this helped love.
In Mesopotamia they used irrigation canals to bring water to crops.