Answer:
The region had no forests for timber or usable stone to quarry for building materials.
Step-by-step explanation:
Mesopotamia is the Middle East region located between the Tigris and Euphrates rivers, in what is now Iraq and Syria. This region is characterized by being the cradle of the first civilizations, especially the Sumerians.
At first, the possibility of developing cities in the region was considered difficult, given the lack of elements necessary for construction such as wood, given the little presence of forested areas in the region, which tends to be rather desert. However, this obstacle was overcome by these civilizations, which developed on the banks of the mentioned rivers, making use of the fertile lands that were generated there thanks to the constant flooding caused by the rivers in the adjacent areas.