Which mode includes a scale with a flat 2?

The correct choice is Phrygian Mode, which is characterized by its distinctive flat 2. The Phrygian mode is the third mode of the major scale and can be thought of as a natural minor scale with a lowered second degree. For example, in the context of the C minor scale, the Phrygian mode would begin on E, resulting in the notes E, F, G, A, B, C, and D.

This flat second degree imparts a unique sound often associated with exotic or Spanish music. The presence of the flat 2 is what sets Phrygian apart from other modes. Other modes such as Dorian and Mixolydian do not feature a flat 2, while Locrian is more complex due to its diminished fifth. Understanding the structure of these modes and how they relate to their respective scales is essential for musicians, especially when exploring different musical styles and improvisation.