What is an example of a product form?

A product form refers to the specific version or variation of a product within a broader product category. It is the tangible manifestation or enactment of a product idea. In this context, "hamburger restaurants" represent a specific type of establishment that focuses exclusively on serving hamburgers, encapsulating a particular way that consumers experience and purchase food. This fits the definition of a product form as it highlights a specific service and offering within the larger category of food service represented by restaurants.

While other options, such as "McDonald's," denote a particular brand or chain rather than a product form, "pasta" and "pizza restaurants" also depict broader categories rather than the specificity needed for a product form. Thus, "hamburger restaurants" accurately aligns with the concept, exemplifying a distinct style and experience tied explicitly to the product being served.