Answer: B) A religious and civic center
Explanation: Ziggurat is a pyramidal structure characteristic of the Sumerian civilization of ancient Mesopotamia. These pyramids had stairs that provided access from the earth to the top of the pyramid, i.e. to the heaven. According to the Sumerian belief, the pyramids that are ziggurats were connections between heaven and earth. As religions were important in shaping the thinking, behavior, culture in general of ancient peoples, ziggurats played an important role in social, cultural and religious activities.