PRINCIPLES OF ART: Balance, emphasis, movement, proportion,rhythm, unity, and variety; the means an artist uses to organize elements within a work of art. by the careful placement of repeated elements in a work of art to cause a visual tempo or beat. equilibrium or stability to a work of art.
Artists usually use musical imagery to make their compositions more unique and alive. Imagery in music used to "show" music. Because of that listeners feel what happens. They see music like complete composition. They hear sounds, they feel movement, they see a picture. It makes music deep. That's why musical imagery is very important and is used by artists so frequently.
I think "clean is the answer