Answer: For context, a relief sculpture is done on a flat surface. It looks more like a carving. A relief might be easier to create is it can be mounted, shaped like a drawing, and perhaps less heavy. A drawback might be that it’s less three dimensional, or that it might be harder to make it more realistic.
Chopin's first étude focuses on a rippling chord progression. The piece is composed in the same ternary (or A-B-A) form as most of his Op. 10 études, introducing two ideas before coming back to repeat the first.
