To which component of fashion does karl lagerfeld’s remark “there’s no fashion if nobody buys it” refer?

There's no fashion if nobody buys it basically means that if no one wants it then it's probably not very good or that if no one buys it then it's just trash and you should throw it away.

False all art is good and cotains that

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art.