In which type of government is the head of government referred to as a Prime Minister?

The head of government is referred to as a Prime Minister in a parliamentary government. In this system, the Prime Minister is typically the leader of the majority party in the parliament and is appointed by the legislature. This structure creates a close relationship between the executive and legislative branches, allowing for more straightforward accountability and responsiveness to the electorate.

In parliamentary systems, the Prime Minister often has a significant role in setting governmental policy and direction, and can be removed from power by a vote of no confidence from the parliament, which reinforces the legislative body's influence over the executive. This contrasts with a presidential government, where the president is elected independently of the legislature and holds separate powers, thereby providing a checks-and-balances dynamic between branches. Additionally, while both federal and authoritarian governments can exist in various forms of political leadership, the term "Prime Minister" specifically aligns with the parliamentary model.