What is one of the main differences between a monopoly and an ologolipy?

One of the main differences between a monopoly and an oligopoly is the number of firms that control the market. In a monopoly, a single firm dominates the entire market, allowing it to set prices and control supply without competition. In contrast, an oligopoly consists of a few firms that hold significant market power, leading to interdependent pricing and strategic decision-making among them. This results in a competitive environment, albeit limited, where firms must consider the actions of their rivals.