Which describes the price mechanism?

• A. Price signals that determine allocation of resources through interaction of supply and demand.
• B. The government's policy of fixing all prices.
• C. A system where prices are irrelevant.
• D. A mechanism that sets wages only.

Answer: (A)

The price mechanism is the way prices act as signals and incentives that guide the allocation of resources through the interaction of supply and demand. When demand for a good or service rises relative to its supply, prices tend to rise, encouraging more production and limiting consumption, which gradually shifts resources toward that good. When supply exceeds demand, prices fall, encouraging more consumption and less production, freeing resources for other uses. These price signals reflect scarcity and opportunity cost, helping buyers and sellers coordinate decentralized decisions across the economy without a central planner. For example, if coffee becomes scarcer, its price rises, prompting farmers to grow more coffee and consumers to buy less or switch to substitutes, reallocating resources toward coffee production. The other ideas describe price controls, or prices not mattering at all, or focusing only on wages, which do not capture how prices in general steer the allocation of resources through supply and demand.