The official position of the monarch is best described as:

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The key idea here is the difference between a formal title and how the role operates in a constitutional system. The monarch’s official position is Head of State. That title denotes the ceremonial and representative role the monarchy plays—opening Parliament, hosting dignitaries, symbolizing national unity, and carrying out constitutional duties that are largely non-political. Real governance and policy decisions are handled by the Head of Government and the elected Parliament. While the monarchy is indeed largely ceremonial in practice, the formal description that best fits the official position is Head of State. The other descriptions don’t capture the formal title: Head of Government refers to the political leader who runs the government; a ceremonial figurehead describes how the duties are carried out rather than the official title; and a military leader implies command of the armed forces, which is not the monarch’s role today.