The modern form of exchange that best resembles how ideas were transferred on ancient trade routes such as the Silk Road is: Information posted on a social media page would be shared repeatedly until it reached people around the world.
This option highlights the rapid and widespread dissemination of ideas and information in contemporary society, similar to how merchants, travelers, and scholars exchanged not just goods but also cultural and intellectual ideas along the Silk Road. Just as the Silk Road facilitated the blending of diverse cultures through the movement of people and goods, social media allows for the sharing and exchange of diverse ideas globally, influencing cultures in a similar way.