Which of the following is considered a form of stealing?

Price tag switching is considered a form of stealing because it involves the intentional act of manipulating the pricing of an item to gain a financial advantage. This deceptive practice typically entails placing a lower-priced tag on a higher-priced item, which results in paying less than the true value of the item. This action is often viewed as fraudulent and is illegal, as it involves misrepresentation and dishonesty in a retail environment.

In contrast, returning an item to a store for a refund is a normal and legal consumer activity as long as it complies with the store's return policy. Redeeming a coupon is also a legitimate practice that consumers engage in to receive discounts on their purchases, while asking to borrow an item temporarily is generally a matter of social agreement and does not involve deceit or theft. Thus, price tag switching stands out as a clear act of theft due to its fraudulent nature.