On the basis of availability of resources establishment of industry, trade and commerce takes place. When nation do not have adequate resource they develops a trading network (import and export) to collect resource form other countries.
Explanation:
Resource is the transformed form of neutral staff. When a thing is used for the betterment of life and utilized in a proper way then its transformed into resource. If a nation suffers from inadequate supply of trades then they open a trade network in between various countries so that they can get required amount of resource at a time.
Import means bring up the commodity from other country and export mean transfer of commodity to other country those who are in need of it.
Answer:
The silk route because it describe that it was one of the most important
