The document discusses the determinants of demand. It identifies six key determinants: (1) changes in income, (2) changes in prices of related goods like substitutes and complements, (3) changes in population size or composition, (4) changes in price expectations, (5) changes in tastes/preferences, and (6) changes in consumer expectations about health effects. It provides examples showing how an increase or decrease in these determinants would shift a demand curve, representing a change in the quantity demanded at each price level rather than a movement along the curve.