which country do they belong to?
England
One Direction
One Direction, often shortened to 1D, are an English-Irish pop boy band formed in London, England in 2010. 
when did one direction audition for x factor 2010 what is one direction? An English-Irish pop boy band
wiki:24158357
One Direction [SEP] Introduction
One Direction, often shortened to 1D, are an English-Irish pop boy band formed in London, England in 2010. The group are composed of Niall Horan, Liam Payne, Harry Styles and Louis Tomlinson; former member Zayn Malik departed from the group in 2015. The group signed with Simon Cowell's record label Syco Records after forming and finishing third in the seventh series of the British televised singing competition "The X Factor" in 2010. Propelled to global success by social media, One Direction's five albums, "Up All Night" (2011), "Take Me Home" (2012), "Midnight Memories" (2013), "Four" (2014), and "Made in the A.M." (2015), topped charts in most major markets, and generated hit singles including "What Makes You Beautiful" (their first number one on the UK Singles Chart, and the highest debut for a British act on the US "Billboard" Hot 100 since 1998), "Live While We're Young", "Best Song Ever", "Story of My Life" and "Drag Me Down".