a melodic line taken entirely from Gregorian Chant and used as the basis for a polyphonic composition is called

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?

In a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.

What is always coming, but never arrives? this is a tricky question i don’t necessarily need to know the answer because i already do but— give it your best shot