Final answer:
Scarcity can be increased by a decrease in consumer income levels, anticipated substantial price increases, or a decrease in availability of related products.
Step-by-step explanation:
Scarcity refers to the limited nature of society's resources. An increase in scarcity of a product could occur if there is a decrease in consumer income levels, which diminishes the ability of consumers to purchase products, leading to higher perceived value and lower availability. Additionally, if there is an anticipated substantial product price increase, consumers may rush to buy the product before the price goes up, temporarily reducing the available supply. Scarcity can also result from a decrease in the availability of related products, as consumers may shift their demand to the product in question, thereby increasing its scarcity.