The following are examples of economic goods except

An economic good is a product or service that has value and can be traded or sold in a market. It is something that people are willing to pay for because it satisfies a need or a want. Out of the options provided, the example of "air" is not an economic good because it is not scarce and has no economic value in most cases. While air is essential for life, it is generally available in abundance and free of charge. Therefore, it is not a product that people typically buy and sell in a market, and it is not considered an economic good. On the other hand, bottled water, household utensils, and shelter are all examples of economic goods because they have value, are scarce, and people are willing to pay for them to satisfy their needs and wants.