Answer: monopolistic competition
Step-by-step explanation:
A monopolistic competition is the feature of an industry whereby there are many firms that offer goods or services which are identical but the goods or services aren't perfect substitutes.
The decisions taken by a firm does not directly affect the competitor. Firms sell goods or services that are differentiated and also charge different prices for such products.
Therefore, retail stores and make goods and services different by the design of marketing appeal including special features is a feature of monopolistic competition.