Shading is showing the objects' roundness or shape; shade is the blocking of a light source; and shadow is the variation between black and white with the darkest part at the center and the 'shadow' fades at the edges.
The answer is <span>Interpretation
When creating an artwork, artists often put his emotion, principles, or pollitical value into his artwork and does not give any information about it for the audience. When the audiences see the artwork, they would combined the artform that they see with their own emotion/principles which lead to the personal interpretation on what the artists actually want to convey.
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1.he inspired perspective in painting
2. last self portrait in 1972, everyone was sad but amazed that he worked up until he died.
Beethoven was in fact not the first composers