Klee often incorporated into his paintings. letters and numbers animals political symbols

I believe the correct answer is letters and numbers.

Paul Klee was a Swiss German avant-garde artist, which individual style was influenced by movements in art that included Expressionism, Cubism, Abstraction and Surrealism. Klee is known for frequently using letters and numbers, which he combined with playful figures of animals or people.

the style of music that was composed during the classical era was concerto grosso.

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.