What was the purpose of the Silk Road?

The purpose of the Silk Road was for India to gain control of the trade route to charge higher taxes.
The purpose of the Silk Road was to trade, sell, and purchase goods from one port to the next using a sea-based route.
The purpose of the Silk Road was to trade, sell, and purchase goods from one town to the next using a land-based route.
. The purpose of the Silk Road was to establish and expand trade routes between Asia and Central America.

The purpose of the Silk Road was to trade, sell, and purchase goods from one town to the next using a land-based route.