The term that describes a divine entity that exists at multiple levels or forms is henotheism. Henotheism refers to the belief in and worship of a single deity while recognizing the existence of other gods. This allows for the possibility that the chosen god can manifest in various ways or forms, making it a fitting description of a divine entity with multiple levels of existence.
Polytheism, in contrast, involves the belief in and worship of multiple distinct gods, while monotheism centers on the worship of one supreme deity, rejecting the notion of multiple forms of divinity. Animism attributes spiritual essence to animals, plants, and inanimate objects, emphasizing nature rather than a multifaceted divine being. Thus, henotheism is the most accurate choice for a divine entity that exists in various forms or levels.