Final answer:
The limited choices of construction systems in early Sumeria were due to geographical and resource constraints. The region lacked stone, precious metals, and timber, leading to reliance on mud bricks and clay. Long-distance trade was necessary for essential materials.
Step-by-step explanation:
The limited choices of construction systems available to the early people of Sumeria in Iraq were primarily due to the geographical and resource constraints of the region. Sumeria lacked stone, precious metals, and timber, which limited the availability of building materials. As a result, the early people of Sumeria relied heavily on mud bricks, wooden doors, and reeds for construction.
The scarcity of stone made sun-baked bricks and clay the dominant building materials in Babylonian and Assyrian architecture. The lack of stone also influenced the use of load-bearing architecture and the invention of the round arch. Additionally, the region's reliance on long-distance trade for essential materials further limited the available choices of construction systems.
Overall, the geographical limitations and scarcity of resources in Sumeria restricted the construction options for its early inhabitants.