Answer:
the process of spread of a feature or a trend from one place to another over time
Explanation:
diffusion is when innovations spread to new places while staying strong in their original locations.
Just be honest with them and everything will work out :)
The similarity between the social system is the hierarchy that created in society based on the job that held by individuals.
The main difference is the openness. South Asian culture directly acknowledge the discrimination while the European culture masked it even though the nobles held all the power in the society.