Changes in demand can be affected by:

1. Changes in consumer tastes and preferences: Consumer tastes and preferences can have a significant impact on the demand for a certain product or service. As preferences change, businesses must adapt to meet customer needs, or risk losing out to competitors. 2. Changes in the economy: Economic conditions, such as GDP growth or recession, can also have a major effect on the demand for certain products and services. During recessions, demand tends to be lower, while during periods of economic growth, businesses have a better chance to increase sales and profits. 3. Changes in price: Changes in price can also lead to changes in demand. As prices increase, the demand for a certain product tends to decrease, while as prices decrease, demand tends to increase. 4. Changes in the availability of substitutes: Substitutes for a particular product can affect the demand for a product, as customers may choose to buy a cheaper alternative instead. As the availability of substitutes increases, the demand for the original product could decrease. 5. Changes in population size: Population growth can have a significant impact on the demand for certain products and services. As more people come into the market, businesses may be able to target these new customers, leading to an increase in demand. At the same time, economic growth can lead to a greater number of people with more expendable income, which could again lead to an increase in demand.