Utilize the input text as a context reference, choose the right relationship between Ofcom and postal sector 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.

Fri, Jul 17, 2015, 13:21 BST - UK Markets close in 3 hrs 9 mins Royal Mail shares drop as Ofcom launches ‘fundamental’ review of postal sector By Jon Yeomans | Telegraph – 46 minutes ago 512.50 -14.5000

Answer: industry