Utilize the input text as a context reference, choose the right relationship between different and music streaming 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.

Apple is going to launch its upcoming music streaming service in a host of different countries around the world.

Answer: distribution_format