In art, balance in a painting provide an aesthetically pleasing feeling, along with equilibrium.
Could you please include a picture of the artworks so that you can get a reliable answer.
Because it’s a way of expressing yourself in a visual form through the use of lead. Pencil can be smudged, shaded and hard drawn which creates an image with many layers using only one substance.
Pop art was a reaction to the nonrepresentational nature of abstract expressionism