In two-dimenstional art, spatial relationships are created (i. e. the illusion of distance in a painting, making some objects appear closer and others farther away) through the use of:

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.

c would  be the answer.