Final answer:
Having a common currency benefits the EU by increasing trade, promoting economic integration, and ensuring stability and credibility.
Step-by-step explanation:
Having a common currency, such as the euro, benefits the European Union in several ways:
- Increased trade: A common currency eliminates the need for currency exchange, making trade among member nations easier and cheaper.
- Promotion of economic integration: The euro fosters economic and political integration as it symbolizes unity and cooperation among member nations.
- Stability and credibility: The euro has value as a currency because it is backed by the European Union, which maintains control over the supply of the euro and ensures its stability. This creates public confidence in its value.