The market price becomes competitive due to firms' competition but only when there are many firms in the market.

Yes, that's correct. Here's a step-by-step explanation:

1. Number of Firms: In a competitive market, there are many firms, each selling an identical product. No single firm has any influence over the price of the product. This is because each firm produces a small enough portion of the total output that increasing or decreasing its output does not noticeably affect the total.

2. Price Takers: Because no single firm influences the market price, each firm in a competitive market is said to be a price taker. The price taker views the market price as given. It can sell as much as it wants at the market price, but it cannot influence the price.

3. Market Entry and Exit: New firms can freely enter and exit the market. If a firm is making profits, new firms have an incentive to enter the market. This entry increases the number of products in the market and drives down prices and profits. Conversely, if firms are incurring losses, some firms have an incentive to exit the market. Their exit decreases the number of products in the market and drives up prices and reduces losses.

4. Competitive Pricing: The process of entry and exit continues until the firms in the market are making exactly a normal rate of return on their investments. At this point, the market is in long-run equilibrium. The price in the market is equal to the minimum of the long-run average cost of production. This is the competitive price.

5. Market Efficiency: The competitive price is also the efficient price. This is because the price is equal to the cost of production. Any other price would either give firms an incentive to enter or exit the market. Therefore, the competitive price is the price that maximizes total surplus in the market.