The best explanation for the role of human sacrifice in the Aztec Empire is:
It was a highly structured ritual practice where individuals chosen as sacrifices were honored.
Human sacrifice in the Aztec Empire was integral to their religious beliefs and cosmology, viewed as a necessary act to appease the gods and ensure the continuation of the world. While it often involved captives or individuals from rival tribes, the process and rituals surrounding it were highly formalized, and those who were sacrificed were sometimes seen as honored participants in the ceremonies.