Explanation:

A chain store or retail chain is a retail outlet in which several locations share a brand, central management, and standardized business practices. They have come to dominate the retail and dining markets, and many service categories, in many parts of the world. A franchise retail establishment is one form of chain store. In 2005, the world's largest retail chain, Walmart, became the world's largest corporation based on gross sales.
In 1792, Henry Walton Smith and his wife Anna established W.H. Smith as a news vending business in London that would become a national concern in the mid-19th century under the management of their grandson William Henry Smith. The firm took advantage of the railway boom by opening news-stands at railway stations beginning in 1848. The firm, now called WHSmith, had more than 1,400 locations as of 2017.