Final answer:
The United Kingdom does not use the euro; it retains its traditional currency, the pound sterling. The UK's decision reflects its choice to maintain control over national monetary policy rather than fully integrate with the euro arrangements dictated by the European Central Bank.
Step-by-step explanation:
The member state of the EU that does not use the euro is the United Kingdom. Despite being a major economic force within the EU, the UK chose to maintain its traditional currency, the pound sterling, rather than adopting the euro. The conception of the euro in 1999 was to create a single market for the free movement of goods, services, money, and people among EU countries.
While it has been accepted by many member states, some like the UK, Denmark, and Sweden decided to keep their national currencies. A country that joins the eurozone loses control over its domestic monetary policy, as interest rate decisions for the euro are made by the European Central Bank, affecting all members.The member state of the EU that does not use the euro is the United Kingdom. While most EU countries have adopted the euro as their main currency, the United Kingdom has chosen to keep its traditional currency, the pound sterling.