Final answer:
Sumerian religion was polytheistic with each city-state worshipping a patron god. These gods were central to the society, and rituals and temples were crucial to maintain their favor and avoid divine wrath.
Step-by-step explanation:
Sumerian religion reflected the idea of polytheism, where each city-state worshipped a patron god above others, often in grand temples and specialized ziggurats. Theocratic rulers or priestly governors, linked to the divine, managed these religious and political centers, ensuring that the deities were worshiped and honored to maintain favor and avoid calamities such as famine or conquest. Rituals, sacrifices, and practices aimed at pleasing these gods were central to Sumerian life, with each city-state having its own divine protector who guided and influenced the community's well-being.