The answer is true. The four market structures are; perfect competition; this is a market structure in which there are many buyers and sellers in the market dealing with similar goods. In this market structure, no firm can influence prices; hence all products are produced at an optimal level.

Second is the monopoly; in this structure, it is only one firm that controls the entire market. In this structure, consumers are easily exploited because they have no alternative; it maximizes profit by reducing the production and overpricing its products and services.

The third is an oligopoly. This is a type of market structure dominated by a small number of firms in an industry. In this market structure, the firms can collaborate to raise prices and maximize their profits. There is limited competition in this market structure.

Lastly is a monopsony. This is a market structure where there are many firms and only one buyer. In this case, the buyer influences the force of demand and supply alone. This market is said to have imperfect competition since it merely an individual buyer who dominates the market.