Answer:
Sumer met the three criteria of a civilization through their religion, culture, and food surplus. The Sumerians believed in multiple gods and built temples called ziggurats to worship them. They also had different types of jobs like traders, scribes, farmers, and inventors, which showed their complex division of labor. The farmers were able to produce more food than needed, creating a surplus. In addition to these criteria, Sumer also had a writing system and a monarchy for their government.
Step-by-step explanation: