Answer:
Correct answers are:
Florence - Banking
Milan - Weapons and silk
Venice - glass production
Explanation:
All of the mentioned cities used their good geographical position to strengthen their influence in economy.
Trading center Venice started producing its own glass, which was an important product at the time.
Milan started producing silk, and they didn't needed to import it from China anymore.
Families in Florence, such as Medici had the monopoly in banking system.
