The determinants of demand include:

The correct choice identifies the determinants of demand as factors other than price that influence the quantity of a good or service that consumers are willing to purchase. These determinants can include variables such as consumer income, tastes and preferences, the prices of related goods (substitutes and complements), and expectations about future prices.

Understanding these factors is crucial because they help explain shifts in the demand curve. For instance, if consumers' incomes increase, they may buy more of a normal good, leading to an increase in demand. Conversely, if the prices of a substitute good decrease, demand for the original product may decrease as consumers opt for the cheaper alternative.

This understanding differentiates the determinants of demand from concepts like quantity supplied and price elasticity, which focus on supply-side dynamics or the responsiveness of quantity demanded to price changes, rather than the fundamental factors affecting overall demand. Additionally, costs of production relate to supply conditions and do not directly influence demand.