1. The problem asks: What is a harmony? 2. In music, harmony refers to the combination of different musical notes played or sung simultaneously to produce a pleasing sound. 3. Harmony supports the melody and adds depth and richness to music. 4. It involves chords, which are groups of notes played together. 5. The study of harmony includes understanding how chords progress and relate to each other. 6. Harmony is fundamental in creating the emotional and aesthetic effect in music.