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

(4 points)
plz help

1. Political organization: The Incas had a highly organized central government with a bureaucratic system that helped to administer the empire. They had a hierarchical system of government with local rulers reporting to the central Inca government.

2. Road system: The Incas built a vast network of roads that connected the different regions of their empire. This allowed for quick communication and transportation of resources, troops, and officials.

3. Quechua language: The Incas imposed their official language, Quechua, throughout the empire. This helped to facilitate communication and unity among the diverse ethnic groups within the empire.

4. Religious practices: The Incas promoted a common religion that centered around the worship of the sun god, Inti. This shared religious belief helped to create a sense of unity among the various ethnic groups in the empire.