<P> Malik has described the album as a way of growing with their fans, and having more mature lyrics without straying from their style too much . The album provides a place for each member to showcase their styles of writing, particularly Styles, whose four tracks on the album perfectly sum up the songwriting skills he has . </P> <P> The name and cover of the album were announced on 8 September on One Direction's official website, along with a free download of a song called "Fireproof", which was available for 24 hours . Horan stated that the reason for the free download was "because you have supported us so much, we wanted to give a little something back". "Fireproof" was written by Payne and Tomlinson along with John Ryan, Jamie Scott and Julian Bunetta, who also wrote their single "Story of My Life". In the 24 - hour span, 1.1 million downloads were generated . The song was put on the band's Vevo on 22 September . </P> <P> In an interview with Simon Cowell, it was revealed that one of the songs for the album will be titled "18". The song was written by Ed Sheeran, who also wrote "Little Things" and "Moments" for the group . </P> <P> Horan came up with the name of the album, commemorating the fact that it is the band's fourth album and that it has been four years since their formation . </P>

Who wrote the song 18 by one direction