2 Elements:
Color is being used in cooperation with Line to make colors "pop" more. Along with this, it provides and organized, yet visually appealing aesthetic to the art piece.
Color in particular, is what separates the work into sections that draw the viewer's eyes in, due to the contrast choices by the artist.
While Line, physically separates the colors, but provides the attractive composition.
(I would answer principles too, but I don't have the time currently;; Hopefully this helps though.)
My answer would be B, because studying is the better way know more deeper about how to start working, so if you want an employ and you have a degree it's easiest than when you don't have it, now there are people that not even studied and they are rich, but this doesnt apply for all the cases.
