Which of the following is NOT a part of the UK Parliament?

The Senate is not a part of the UK Parliament, as it is associated with the legislative structure of the United States. The UK Parliament is composed of three main parts: the House of Commons, the House of Lords, and the Monarch. The House of Commons is made up of Members of Parliament (MPs) who are elected, while the House of Lords consists of appointed members, including life peers, bishops, and hereditary peers. The Monarch plays a ceremonial role in Parliament, including the opening of sessions and giving royal assent to legislation. In contrast, the Senate in the U.S. has a completely different function and structure, which is why it is not part of the UK parliamentary system.