Answer:
intermarriage
Explanation:
there were intermarriage between the muslims and other culture
Answer:
D. physical boundary
Explanation:
Google the himalayas as borders in south east asian countries, you'll clearly see that they exist as physical boundaries between nations such as Nepal and China.
The answer to the question is D
I've always heard it to be a. schools, but I'm not sure if that's the name for the specific situation you described.
