Answer:
The correct answer will be option- migration.
Step-by-step explanation:
In ancient period, the only medium to spread any idea was the migration of the people from one region to unknown region of the world.The idea of language, script, writing and the then developed technology migrated from one region of the world to another only through the migration.
The evidence suggests that the trade routes between two regions led to the exchange of these ideas like the silk route brought Arabian concepts to the eastern life and they took the ideas from eastern world to their region.
Thus, option-migration is the correct answer.