Explanation:

- Option 1: Monopoly

- In a monopoly, there's a single seller. There isn't a traditional supply curve because the monopolist sets prices.

- Option 2: Monopolistic competition

- Here, many firms sell similar but slightly different products. Individual firms have some control over their prices, impacting typical supply curve analysis.

- Option 3: Perfect competition

- In perfect competition, numerous firms sell identical products. Each firm is a price taker, perfectly reflecting the supply curve as the relationship between price and quantity.

- Option 4: Oligopoly

- In an oligopoly, few firms dominate the market. Their supply decisions are interdependent, affecting typical supply curve representation.

Correct Answer: Option 3 - Perfect competition