why are there so few structures still surviving from ancient mesopotamia?

Question

a all of the structures from this time period were made from clay bricks, and natural erosion has worn most of the small buildings away
b many ruins have long served as quarries for building materials
c wars and pillaging of artifacts contribute to the lack of surviving structures
d all of the above

Answer 1

d all of the above

All of these factors have contributed to the scarcity of surviving structures from ancient Mesopotamia. The usage of clay bricks, natural erosion, the repurposing of ruins for building materials, and the impact of wars and looting have all played significant roles in the degradation and loss of ancient structures.