Dominant Harmony: Dominant harmony refers to chords or progressions built on the fifth scale degree (the dominant) that create tension and lead back to tonic harmony.
Subdominant Harmony: Subdominant harmony involves chords or progressions built on the fourth scale degree (the subdominant). It adds stability but also some mild tension compared to tonic harmony.
Predominant Function: The predominant function refers to a chord or harmonic progression that creates tension and prepares the listener for the dominant function. It typically occurs before the dominant chord in a musical piece.