Answer:
the growth of banking houses
Explanation:
Based on the evidence in this passage, "the growth of banking houses" was an economic development that encouraged trade in Europe from 1200 to 1450.
This rise of banking houses supported economic growth and also helped to develop interregional trade in luxury goods. The excerpt reveals that there was the use of a means of exchange known as "paper money". This paper money shows the growth of banking houses at that time and probably issued by the banking houses. So, people paid for goods with the use of paper money.
In the Middle Ages, the banks were developed in Europe to aid trading.
