Final answer:
The plague contributed to social and economic changes in Europe. Europe lost a third of its population, leading to depopulation and weakened feudalism. Labor shortages brought higher wages and peasants left their manors, causing a decline in the feudal system.
Step-by-step explanation:
The conclusion that can be drawn from the listed information is that the plague contributed to social and economic changes in Europe.
Europe lost a third of its population due to the plague, leading to widespread depopulation. This depopulation weakened the feudal system as peasants left their manors in search of better opportunities, and labor shortages resulted in higher wages for many workers. As a result, social hierarchies shifted, and the feudal system of the Middle Ages began to decline.