Answer:
Consolidation of power
Expansion of territories and boundaries
Unification of people
Promoting ideologies
Explanation:
The rise of empires was influenced by several factors. For instance, there were constant inter-tribal wars between the tribes. This resulted in the need to build robust defense mechanisms. Thus, organized empires were formed. In addition, the kings and monarchies wanted to consolidate power to themselves and pass it to their progenitors. Hence the kings formed empires.
The expansion of territories influenced the formation of empires. This was as a result on the need to expand the territorial gain and dominance. This only happened when there were organized empires.
One other reason was the unification of people. The people at some point were scattered in different states. By unifying the people, the empire will be strong.
The promotion of certain ideologies also sped the formation of empires. For example, the promotion of religious beliefs also led people to be united into common groups according to religious convictions.