Answer:
1. Affective experience (music)
2. Performance (players)
3. Community (audience)
4. Memory/History (time and space)
(I believe)
Explanation:
In tonal Western classical music (music with a tonic key or "home key"), the most frequently encountered chords are triads, so called because they consist of three distinct notes: the root note, and intervals of a third and a fifth above the root note. ... A series of chords is called a chord progression
