Final answer:
In ancient China, rulers received authority to rule based on the concept of the Mandate of Heaven, where virtuous behavior ensured legitimacy and signs of natural disasters indicated a loss of the mandate.
Explanation:
The authority to rule in ancient China was given through the concept of the Mandate of Heaven. This belief stated that heaven chose a virtuous ruler to govern, and as long as the ruler acted morally, listened to advisors, and ensured the well-being of the people, they retained the mandate. If a ruler became wicked or inept, signs like natural disasters symbolized the loss of the mandate, leading to the rise of a new virtuous leader.
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