Final answer:
Human sacrifice, a key aspect of the Aztec religion, was performed to appease the gods and maintain the world order.
Explanation:
Coal was not a part of the Aztec religion; rather, human sacrifice played a significant role in their religious practices. The Aztec religion emphasized the continual need for sacrifice to maintain the world order, rooted in their origin myth where gods sacrificed themselves to create the world, leading to a continuous ritual of human sacrifice to appease the gods. Priests conducted these rituals, often using captured warriors as victims to fuel the sacrificial calendar.
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