Who is the head of the Commonwealth?

The correct answer is that the head of the Commonwealth is the Queen of the United Kingdom. This role highlights the Commonwealth's historical ties to the British monarchy. The Queen serves as a symbolic figure intended to represent unity and shared values among the member states, which are largely former territories of the British Empire.

The head of the Commonwealth is distinct from governmental leaders, as the role does not carry legislative power or executive authority. Instead, it emphasizes the connection and cooperation among the diverse nations within the Commonwealth, which includes 54 member states. In contrast, the other options represent different roles that do not align with the ceremonial and representative function held by the Queen.