Which principles of design does this image show?

This painting is by james whistler, and is entitled, symphony in blue and pink. what is the subject matter of this piece?

In the ninteenth century,why was it more nessesary for art to provide accyrate represemtations of life and objects

Which clef would be used for the violin? a. treble b. tenor c. bass d. alto what causes sound? a. electric fields b. magnetic fields c. vibrating electrons d. vibrating molecules