The prime minister and his cabinet are controlled by? ?

The work of the Prime Minister and his cabinet is controlled by Parliament.

A prime minister or chief minister is a politician who serves as head of executive power in some states as a separate office of the head of state. It is usually the head of government in the parliamentary system. In other systems, such as semi-presidential, the prime minister is the official in charge of Public Administration. Often, a prime minister exercises his functions with a president or a monarch who serves as head of state. The prime minister is normally the leader of the political party that has the majority in parliament.

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the northwest territory became the most densely populated area in the u.s.