What is the relationship between Ofcom and postal sector 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.

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