Answer:
1.a city-state is a state that contains an independent city which is not administered or governed by another government. A sovereign state consisting of an independent city and its surrounding territory.
2.The supply of water to land or crops to help growth, typically by means of channels.
the river supplies water for irrigation of agricultural crops
3.a straight, narrow cut or opening in something.
4. the earliest cities in Sumer date back to about 3500 B.C.E. These first cities were like small independent countries. They each had their own farmland to provide food. For this reason, they are called city states.
5. They needed to work together to clean the canals. ... Early Sumerian cities were walled settlements surrounded by farmland. The strong city walls were built of sunbaked bricks.
6.There were no mountain ranges or rushing rivers to keep out enemies. The Sumerians began to build strong walls around their cities. They constructed the walls out of mud bricks that were baked in the sun until hard. The Sumerians also dug moats outside city walls to help prevent enemies from entering their cities.
