Answer:
The form of authoritarian government in which power is handed down through family lines and rules stay in power for life is monarchy.
Step-by-step explanation:
The monarchy is a form of government in which the office of head of state is exercised by a single person for the duration of his life or until his abdication.
This figure is the monarch and is considered a separate member of the rest of the people of the state who are his subjects. When the monarch ceases his functions he is replaced by a new one, usually according to a hereditary criterion in the context of the same family, called the dynasty.