The correct answer is D. Migration
Explanation:
Migration refers to the movement of people from one region or country to another due to factors such as better living conditions, war, work opportunities, among others. This is one method of cultural diffusion or the spread of values, ideas, customs, etc. from one culture to another because migrants continue displaying elements of their home country even in a new country including beliefs, practices, among others and these can be learned by friends, family, colleagues or other members in the home country According to this, the correct answer is migration.
