Which element of art seen in a cude demonstrates depth though shading contour line or highlights

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

Which does the author mean by " nature had to kindle all the fires, for man by his own effort was unable to produce a spark

This example of eqyptian tomb decoration. answer the following what type of sculpture is this tomb decoration? why was this type of sculpture common among egyptian tombs? what is the title of the sculpture