According to the study material, creases can be removed from velvet fabric without damaging the pile by

a. stretching it tightly on a velvet-covered board.
b. pressing it firmly on a hard surface, wrong side up.
c. hanging it in a steam-filled room.
d. pressing it directly on the right side.

I believe the answer in C. Hope this helps!

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. 

Happy }joy }love }those are the words : ) good luck!