What is the distinctive feature of the Harmonic Minor scale?

The distinctive feature of the Harmonic Minor scale lies in its specific alteration of notes, primarily the seventh note. In this scale, the seventh note is sharpened when ascending and commonly remains sharpened when descending, creating a unique sound that contributes to its emotional and dramatic qualities. This raised seventh creates a leading tone that strongly resolves to the tonic, which is why it is particularly favored in classical music and various folk traditions.

The version of the scale you mentioned enhances the tension that resolves into the tonic and gives the harmonic minor its characteristic sound, distinguishing it from other minor scales. In contrast, other options modify other notes without providing the same distinctive role of the sharpened seventh in creating resolution and tension within tonal music.