Which of the following is NOT a level of product knowledge?

The correct choice emphasizes that "inventory" does not represent a level of product knowledge. In the context of consumer behavior and product knowledge, levels typically refer to the various dimensions that help consumers understand what a product is, how it can be used, and what differentiates it from other products.

The levels of product knowledge generally include:

• Brand: This reflects the perception and recognition of a product's brand name and the associations that come with it, such as quality, reliability, and reputation.
• Model: This provides more specific information about a specific variation or iteration of a product within a brand, helping consumers distinguish between different options.
• Product form: This relates to the physical characteristics or variants of a product, such as its design or type (e.g., a smartphone versus a tablet).

In contrast, "inventory" pertains to stock levels and availability of products rather than enhancing consumer understanding or knowledge of the product itself. It does not contribute to consumer comprehension of product attributes or differentiation, making it the correct choice for the question.