Answer:
The Crusades generated an economic boom in Europe and the Middle East.
The Crusades created an increase in the demand for Near East spices.
Step-by-step explanation:
The Crusades, which were a armed conflict between Christian Europe and Muslim Middle East, had the positive effect of increasing interaction between the people of these regions.
This interaction allowed the creation of new trade networks. Italian cities like Venice were specially good at trade and began to prosper.
The higher demand for goods from the Near East like spices, prompted the development of even more trade networks, and this brought about an economic boom in both Europe and the Middle East.