Answer :
Final answer:
The currency of the European Union is the euro, which was introduced in the early 2000s to foster economic integration among member countries, though some have retained their own currencies.
Explanation:
The Currency of the European Union
The currency of the European Union (EU) is the euro. After World War II, European leaders sought to integrate their economies to avoid future conflicts. This led to the formation of various trade associations and finally the European Union. The EU's introduction of the euro as a common currency was a significant step towards economic integration.
Launched in the early 2000s, the euro aimed to replace individual national currencies like the German mark and the French franc. While most EU members have adopted the euro, a few, including the United Kingdom, Denmark, and Sweden, decided to retain their own currencies, such as the British pound sterling and the Swedish krona. Despite Britain's departure from the EU in 2020, known as Brexit, the euro remains a symbol of European economic unity and continues to be used by most EU countries and even some outside of the union.