Answer:
In tonal music, chord progressions have the function of establishing or contradicting a tonality, the technical name for what is commonly understood as the "key" of a song or piece. Chord progressions are usually expressed by Roman numerals in Classical music theory. For example, the common chord progression I–vi–ii–V.
Explanation:
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The difference between realist art and modernism art:
Realist art is something that's drawn or painted to portray a realistic object. They would make it look real, like a person or a fruit, almost like it would look if you took a picture of it with a camera although they didn't have cameras when realist art was invented.
Modernism art is a type of art that has more colors, lines, and details. It is a stylish type of art that requires complicated uses of form.