The correct response regarding the purpose of the Silk Road is: 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 Silk Road was an extensive network of trade routes that connected the East and West, primarily facilitating the exchange of goods like silk, spices, precious metals, and various other commodities, as well as cultural, technological, and religious exchanges. It did not primarily connect Asia to Central America, nor was it solely focused on port-based trade routes.