Firstly, Nazca pottery is characterized by strong colors. The images shown on Nazca pottery are staring eyes, unspecified gods and people (often just a face); in addition, animals and creatures such as lizards, monkeys, birds, whales and mythical ones are often shown. They were very innovative with the form as well.
Moche pottery also showcased both people and animals. Compared to the Nazca pottery, Moche made their much less colorful. There's usually a cream or white background with red decoration. Their human representations usually have some supernatural features while the animals (birds, fish, feline, reptiles, deer, foxes, monkeys etc.) are both represented realistically or hybridized.
The varying color tones in Paul Klee's "Ancient Sound" were intended to be associated with music.
Paul Klee is an abstract artist whose works are influenced by cubism, surrealism and expressionism. Aside from being an artist, he is also a musician, a violinist. In fact, before painting, he would play violin as his warm-up. This is why the color tones in his artwork express the connection to music.
Answer:
A Structuralist would likely see a plant like image on a blank background, with leaves and some type of buds. On the buds, a mask or clown head appears to have bloomed. The head has human physical features, and looks like its face is painting white with a collar of some type around its neck. A Non-Structuralist would believe there was imagery and symbolism. The plant could represent life or living, and the people or lives that grow and then die, and the lives yet to come to the world. The clown or figures face may represent a person or group, perhaps one which is misunderstood or disliked, based on the look of sadness and despair visible in the face. There are many theories that could be said, however the main difference is that a Non-Structuralist would insist that there is symbolism and not just reality.