The function of the product describes which aspect?

The function of the product refers to what the product is intended to do or its primary purpose. This aspect highlights the capabilities and features of the product that fulfill a specific need or requirement in its intended application. By emphasizing the function, one can determine how well the product serves its intended role, which is crucial for both the manufacturer and the end-user.

In a manufacturing context, understanding the product's function helps in designing and producing items that meet customer needs effectively. While the other aspects mentioned—form, cost, and utilization—are also important, they relate to different elements of product development. For instance, form pertains to the physical characteristics and aesthetics of the product, cost relates to the financial considerations in production and sales, and utilization focuses on how the product is used in practice. Thus, the correct answer emphasizes the core purpose and performance characteristics of the product itself.