Utilize the input text as a context reference, choose the right relationship between Prime and retail from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Its older businesses, such as its North American retail arm and third-party e-commerce marketplace, are highly profitable, but the company sinks those profits into new businesses, like its Prime Now two-hour delivery service or Amazon Fresh groceries.

Answer: industry