Utilize the input text as a context reference, choose the right relationship between Windows Phone and Microsoft 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.

Further losses are attributed to the Windows Phone division seeing a thumping 68 percent revenue decline of $552m, which Microsoft linked to the conclusion of its deal with Nokia and a fall in royalty revenue.

Answer: developer