Canada is a constitutional monarchy — the King, the Governor General and the lieutenant governors

Background

Live hook: Quebec's incoming Parti Québécois government plans to abolish the role of lieutenant-governor, putting the Crown's place in Canada's provinces in the news.
Canada's system of government is a constitutional monarchy and a parliamentary democracy; His Majesty King Charles III is King of Canada and Head of State.
Canada separates the head of state — the Sovereign — from the head of government, the Prime Minister, who directs the governing of the country.
The Governor General is the representative of the King in Canada, and a bill becomes law only after royal assent, granted by the Governor General on behalf of the Sovereign.
In each of the ten provinces the Sovereign is represented by the Lieutenant Governor; in the three territories, the Commissioner represents the federal government and plays a ceremonial role.
Parliament has three parts: the Sovereign, the Senate and the House of Commons; depending on the province or territory, members of the legislature are called MLAs, MNAs (members of the National Assembly), MPPs or MHAs.