Answer:
Her Majesty the Queen of Canada is the head of State for Canada. The Queen performs most executive functions only on the advice of the prime minister (the head of Government) and ministers, accountable to the elected House of Commons. The Queen is represented at the federal level by the Governor General, and on the provincial level by the Lieutenant Governors of each of the ten provinces.
The Queen, as constitutional monarch, is one of the three components of the Parliament of Canada (alongside the Senate and Commons). The Governor General (as the Queen's representative) grants royal assent to bills passed by both Houses. No bill can become law without the assent of the sovereign (the monarch's legislative role is referred to as the Queen-in-Parliament).