Which of the following best defines advertising?

The definition of advertising that aligns best with established marketing principles is that it is a paid form of nonpersonal presentation. This definition emphasizes the fact that advertising involves purchasing space or time to convey messages to a broad audience through various media channels, such as television, radio, print, online platforms, and more. By specifying that it is "nonpersonal," the definition highlights that advertising does not involve direct, individualized communication with potential customers, as is the case with personal selling.

This characteristic of being a paid activity distinguishes advertising from other marketing communication forms, such as public relations, which may not require payment for space or time. Furthermore, nonpersonal presentation allows for reaching large numbers of consumers simultaneously, making advertising an effective tool for creating brand awareness, generating interest, and driving sales.

In comparison, the other options differ in key aspects: they may describe promotional or communication methods that are either unpaid or personal, neither of which aligns with the essence of advertising.