Final answer:
An online marketplace is the non store retailer among the given options. It operates on the internet and allows for shopping without direct human interaction, unlike physical stores.
Step-by-step explanation:
The nonstore retailer among the options provided is the online marketplace. Unlike supermarkets, department stores, and convenience stores, which are brick-and-mortar retail establishments where consumers go to purchase goods in person, online marketplaces operate on the internet without physical stores. Consumers can shop online anytime and anywhere, effectively removing the possibility for direct human interaction during the transaction process.
Non store retailing has grown significantly with the rise of the internet and the convenience it offers to shoppers. Technology has allowed for a wider array of products to be available online and has changed consumer shopping habits.