Answer:
The change which occurred in European society during and after crusade was, The feudal system was eroded. They emerged people who were of middle class, merchants, and tradesmen.
The feudal lords gave some parts of their lands to church which made catholic grew into power and they believed if they help the church by giving out lands they will go to heaven.
Crusades made European curious reason being they started trading exotic goods with the Arabs and they made better maps and there was also cultural exchange.
Jews were seen as enemies and so they faced heavy persecution.
After Crusades, Europe underwent great changes in the fields of churches, commerce and intellectual changes. Churches became richer after crusades because the feudal lords were offering Tithes which means ten percent of the lands which they occupied were sacrificed to the church and its development.
There was a good trade relationship that enhanced in between Arabs and Europe. They bartered goods like precious stones and perfumes with fur. Europeans also became knowledgeable in construction of ships and many voyagers and explorers were sent in search of new islands and new geographic locations.
Feudalism had gradually started to disappear. The need for education in order to learn the holy bible was realized. They were introduced to the knowledge of mathematics, engineering and warfare.
