Final answer:
The Shang Dynasty's religious practices, including worship of multiple gods and ancestor veneration, indicate a polytheistic belief system.
Step-by-step explanation:
The Shang dynasty was known for its reverence for a multitude of gods and the practice of ancestor worship, as indicated by evidence such as the use of oracle bones for divination and rituals. This indicates a belief system that is polytheistic, where multiple deities are honored, rather than monotheistic, which involves the worship of a single deity. The Shang kings acted as high priests, performing rituals to honor their ancestors and the supreme deity Di, indicating the theocratic dimension of their society. The presence of a rich pantheon, ancestor worship, and divination practices exemplify the polytheistic nature of Shang religious beliefs.