Final answer:
The product image cannot be described using the PLC concept.
Step-by-step explanation:
The PLC concept, which stands for Product Life Cycle, is a marketing model that describes the stages a product goes through from introduction to decline. While all the options listed in the question are related to products, product image is the category that cannot be described using the PLC concept. Product image refers to the perception or reputation of a product, which is influenced by factors such as branding, advertising, and public opinion.