Question

inter-mongol conflicts prevented the mobilization of the vast imperial resources that had characterized the earlier campaigns. the khanates were forced to channel their troops to defend their borders against rival mongol leaders, rather than concentrate their efforts on expansion....however, the decrease in the mongol expansion after the empires breakup corresponded with an acceleration in the expansion of trade activities....with taxation replacing plunder as the main source of revenue, the mongol governments promoted local and international commerce....the khanates competed for commercial specialists, laid down infrastructures for transcontinental travel, and played a significant role in facilitating transcivilizational...trade and exchanges.source: essay written by michal biran, jonathan brack, and francesca fiaschetti, historians of central asia, and published in 2020.the transcontinental network discussed in the third paragraph of the passage was primarily devoted to trade instaple foods such as rice.natural resources such as wood.luxury goods such as silk.written materials such as scriptures.

Explanation:

The text mentions that after the Mongol Empire's breakup, there was an acceleration in trade activities. Historically, trans - continental trade networks (like the Silk Road) were mainly about luxury goods. Silk was a major luxury good in such trade. Staple foods like rice were more for local consumption, natural resources like wood were heavy and not as commonly traded over long distances in large quantities for profit in early trans - continental trade, and written materials like scriptures were not the primary focus of large - scale commercial trans - continental trade.

Answer:

luxury goods such as silk.