Final answer:
Europe developed significant trade routes like the Silk Road and the Italian states' trade routes which contributed to economic growth and the rise of powerful cities.
Explanation:
Major trade routes that developed in Europe included the Silk Road which connected Europe to Asia, the Italian states' trade routes linking with the Mediterranean ports and the Hanseatic League creating a network economy. These routes facilitated the exchange of goods such as spices, silk, and porcelain, leading to economic growth and the emergence of powerful cities like Florence.
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