What is the difference between an oligarchy and a monarchy in terms of their governing structures and distribution of power?

An oligarchy is a form of government where power is held by a small group of people, often based on wealth or social status. In contrast, a monarchy is a form of government where power is held by a single ruler, usually a king or queen, who inherits their position. Monarchies typically have a hereditary system of succession, while oligarchies may have more fluid methods of selecting leaders.