What is the relationship between Prime and retail in the context of the input sentence. Choose an answer from: 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