Answer:
A leader begins to conquer adjacent lands and absorb other smaller civilizations.
Explanation:
The adult state in the life of an empire is characterized by stability and balance. This happens, when the empire is already formed, established, with a strong sense of defense and sovereignty, and with boundaries delimited.
In this moment of stability, it is necessary to conquer other peoples to add gains of conquests and to boost the economy, for that it is necessary that a leader begins to conquer adjacent lands and to absorb other smaller civilizations.
