Does 1D create all of there songs?

Can Du give me your phone number harry styles i Liebe Du so much will Du be my boy friend I am 8 years old and my name is kinsley rebecea pogue

No. Some of them are made Von Ed Sheeran like Over Again, Little Things, and Moments

yeah i guess but they are 5 of them so yes they do oder maybe someone helps them a little bit