What fundamental economic concept explains why prices rise when demand exceeds supply?

• A. Supply and Demand
• B. Elasticity
• C. Market Equilibrium
• D. Price Ceiling

Answer: (A)

Prices adjust through the interaction of buyers and sellers, driven by supply and demand. When demand for a good or asset exceeds what is available from sellers, a shortage forms. To clear that shortage, the price rises. The higher price signals producers to supply more and signals consumers to purchase less, moving the market toward a new balance where quantity supplied roughly equals quantity demanded. This is why prices rise when demand exceeds supply.

Elasticity explains how responsive quantity changes are to price shifts, but not the fundamental reason prices rise in a shortage. Market equilibrium describes the balance point after adjustments have occurred, and a price ceiling is a government cap that can prevent prices from rising even in a shortage.