How did the physical features
of sumer contribute to isolated
city-states? explain your
answer.

As the Sumerian villages grew into large cities, they formed city-states. This is where a city government would rule the city as well as the land around it. These city-states often fought each other. They built walls around their cities for protection. Farmland was outside the walls, but people would retreat to the city when invaders came.

Explanation:

the answer is

c. it required that townships set aside land for public schools.