Final answer:
Farming was important in establishing Sumer as a civilization because it supported a larger population, led to settled communities and the specialization of labor, and contributed to the development of writing.
Step-by-step explanation:
The establishment of farming was important in the development of Sumer as a civilization for several reasons. Firstly, farming allowed for a surplus of food to be produced, which supported a larger population. This population growth led to the formation of larger urban centers and the specialization of labor.
In addition, farming provided a stable and consistent food supply, which allowed people to settle in one place instead of constantly moving in search of food. This led to the development of settled communities and the ability to engage in other activities such as building and trade.
Furthermore, farming in Sumer led to the development of writing. As agricultural surpluses grew, there was a need for record-keeping and accounting, which eventually led to the invention of cuneiform writing.