Answer: Chagatai Khanate
Explanation: The Chagatai Khanate most likely prospered as intermediaries from trade among the other khanates. The Chagatai Khanate was one of the four major khanates into which the Mongol Empire was divided after the death of Genghis Khan¹².
As for why the Chagatai Khanate prospered as an intermediary, it's likely due to its strategic location. The Chagatai Khanate was situated along important trade routes, which would have allowed them to facilitate and profit from trade among the other khanates¹². Traders were close to the Khans and political elites and informed decision-making, often serving as emissaries, ministers, and administrators in the service of the Khans³. This position would have given them ample opportunities to act as intermediaries in trade transactions³.
However, it's important to note that historical records from this period can be limited and interpretations may vary. For a more comprehensive understanding, you might want to consult academic sources or experts in Mongol history.