Final answer:
Both Egypt and Mesopotamia believed in many gods, with complex pantheons reflecting their respective environments and societal structures.
Step-by-step explanation:
The place that believed in many gods is c. both Egypt and Mesopotamia. These ancient civilizations were polytheistic and had complex pantheons that governed various aspects of life and the natural world. In Egypt, the gods represented forces of nature and abstract concepts, solidifying a sense of an orderly and harmonious existence symbolized by the concept of Ma'at.
By contrast, the Mesopotamian gods were often seen as fickle and easily angered, reflecting the harsh and unpredictable environment of the region. For example, Mesopotamian cities each worshipped their specific patron deity and built massive ziggurats for worship and as central hubs of city life. The ancient Egyptians hosted numerous gods as well, integrated deeply with their understanding of nature's cycles, especially the predictable flooding of the Nile River.