Which of the following factors is NOT a determinant of demand?

The correct answer is found in the understanding of demand determinants. In economics, the determinants of demand are the variables that can shift the demand curve either to the left or the right. These include the price of the good, the income levels of consumers, and the tastes and preferences of consumers.

Advertising strategies can influence demand, but they are not classified as direct determinants of demand. Instead, advertising affects consumers' perceptions and can indirectly lead to changes in demand; it plays a role in communicating the product's value and creating brand awareness, but it does not directly affect the fundamental demand conditions.

In contrast, the other factors like the price of the good directly affect the quantity demanded. Changes in consumer income levels can either enhance or limit purchasing power, thus shifting demand. Tastes and preferences represent consumers' likes and dislikes, which can cause shifts in demand as well. Therefore, while advertising strategies are certainly relevant to demand, they are not a primary determinant in the same way the other factors are.