Final answer:
Momentum's positioning of its convertible as a "natural tanning tool" exemplifies a product usage-based strategy, focusing on the experience and lifestyle associated with the product.
Step-by-step explanation:
The scenario in which a car manufacturer, Momentum, positions one of its convertibles as "the best natural tanning tool known to man" reflects a positioning strategy based on product usage. This approach focuses on promoting the experience or application of the product in a consumer's life rather than its features, class, or cultural significance. By marketing the convertible as a "tanning tool," Momentum is appealing to a customer's desire for leisure and an outdoor lifestyle, akin to the way Corona Beer uses imagery of a tropical beach to position its product not just as a beer but as a token of relaxation and leisure.