What is an example of good use of complementary products?

The correct answer highlights the concept of complementary products, which refers to items that enhance or add value to each other when used together. In this case, placing a sock display next to the shoe department effectively capitalizes on the relationship between socks and shoes. Customers who are shopping for shoes are likely to be interested in purchasing socks as well, especially if they are reminded of the need for appropriate socks to match or complement their new footwear. This strategic placement encourages additional purchases and creates a more convenient shopping experience.

The other options, while they may involve product placement, do not exemplify complementary products as effectively. Shoes and shirts can be related in style, but they do not necessarily enhance each other in usage the way socks do with shoes. Hats and belts might also match in terms of fashion, but again, they do not create a direct complementary need. Finally, placing sunglasses on the floor does not effectively convey the principle of complementarity in the same way that socks relate to shoes, as it lacks a strategic pairing that would encourage immediate additional purchases.