Final answer:
Design product is not a factor related to physical facilities for retailers; instead, location, store size, product layout, and assortment are the correct factors. Design product pertains to the manufacturing and marketing aspects of a product.
Step-by-step explanation:
The factors related to physical facilities for retailers typically include location, store size, product layout, and assortment. Among the options provided, 'design product' is not one of those factors. Instead, factors such as location can greatly influence a retailer's success, as evidenced by a gas station at a busy intersection likely selling more gas due to higher car traffic. Similarly, retailers consider the size of the store and the layout of products to optimize customer flow and sales. Assortment refers to the range of products a retailer offers to meet customer needs. Design product, however, typically refers to the design aspects of a product itself, such as an 'unbreakable bottle' or 'nonstick surface', which are more relevant to manufacturing and marketing the product rather than the retail store's physical facilities.