Final answer:
The lack of wood limited the construction choices of early Sumerian people, leading to the widespread use of mud bricks due to the scarcity of stone.
Step-by-step explanation:
The factor that limited the choices of construction systems available to the early people of Sumeria in Iraq was the lack of wood. This environmental constraint led the Sumerians to adopt construction materials that were available in abundance, such as mud brick. The extensive use of mud brick was due to the paucity of stone in the region, making it a rare and valuable resource. Consequently, mud bricks became the dominant building material for both domestic structures and impressive public architectures such as temples and city walls.
The early people of Sumeria in Iraq faced a significant constraint in their choice of construction systems: the scarcity of wood. This environmental limitation compelled the Sumerians to turn to locally abundant resources, prominently mud brick, as a primary building material. The region's dearth of stone, a typically sought-after construction material, further emphasized the necessity of utilizing mud bricks. Consequently, mud bricks emerged as the predominant construction material for a wide array of structures, including domestic dwellings and grand public edifices like temples and city walls. This strategic adaptation to environmental constraints not only showcased the resourcefulness of the Sumerians but also left an indelible mark on the architectural landscape of ancient Mesopotamia, defining the distinctive character of Sumerian construction and contributing to the enduring legacy of their built environment.