Wall decorations made from small pieces of marble set in mortar were commonly seen in roman art. what is this type of artwork called?

When clarisse compares percy to the big three how does he feel

The following terms are all associated with harmony except: triad: the simplest chord..it is made up of three notes that are usually spaced one note apart-do, mi, and sol in the do-re-mi (major) scale. consonance: a combination of notes that is considered stable and without tension. phrases: where melodies are often made up of shorter sections. chords: the smallest harmonic unit is one consisting of two notes, but we usually have three or more notes played or sung together to create harmony. those groups of notes make up what are called chords. dissonance: a combination of notes that is considered unstable and tense, so much that they sometimes sound as if they are fighting with one another.

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