what is the most likely reason why modern cities in the fertile crescent may have a decreased water…

what is the most likely reason why modern cities in the fertile crescent may have a decreased water supply?\nthe people no longer build dams.\nthe rivers have decreased in size.\nthere is no way to control the flood waters.\nthe climate has become several degrees hotter.
Answer
Brief Explanations:
Climate change has led to rising temperatures globally. In the Fertile Crescent, a hotter climate can cause increased evaporation, reduced precipitation in some cases, and changes in the water - cycle, all contributing to decreased water supply. Modern dams are still built, rivers haven't necessarily decreased in size mainly due to natural reasons but more because of climate - related water loss, and flood control is not the main reason for decreased water supply here.
Answer:
The climate has become several degrees hotter.