Which of these rulers is an example of a constitutional monarchy

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examples of constitutional monarchs, is the British monarch led by Queen Elizabeth 2, the monarchy of Spain,the monarchy of japan,and the monarchy of Belgium.
A constitutional monarchy is a kind of government where by the monarch is ceremonial, and real powers are vested on democratically elected head of governments. The monarch plays her role as the head of state.

In the late fifteenth century, a major world power that established colonies in the era of old imperialism was france or germany or spain. their colonial activity was mainly limited to america or africa or asia.