What methods did the Incas use to unify their large empire?

(4 points)
short and simple

1. Road system: The Incas built an extensive network of roads that connected different parts of the empire, allowing for easier communication and transportation of goods and troops.

2. Quechua language: The Incas promoted the use of the Quechua language as a common language throughout the empire, helping to unify diverse populations under a shared language.
3. Administrative system: The Incas implemented a centralized administrative system, with officials appointed by the emperor overseeing various regions of the empire and reporting back to the capital.
4. Religion: The Incas promoted the worship of their main deity, the sun god Inti, as a unifying force among different ethnic groups within the empire.