Answer:
fertile soil, irrigation projects, ox-driven plows
Explanation:
The Sumerians were a civilization that existed in the Mesopotania region. They developed large cities around the Tigris and Euphrates rivers, as this region, in addition to having fertile soil, also had water for irrigation, which together with well-developed irrigation projects and plows powered by cattle, promoted a very successful agriculture that served to feed all civilization, as well as to establish a strong trade.
