Identify the feature cited as foundational to heavy metal.

• A. Power chords and modal progressions
• B. Blues scale solos and pentatonic riffs
• C. Acoustic ballads and gentle textures
• D. Electronic dance rhythms

Answer: (A)

Heavy metal finds its defining sound in guitar-driven aggression built on power chords and modal progressions. Power chords—root and fifth, often played with octave doubling and distortion—give a thick, loud foundation that cuts through with minimal harmonic clutter. When you pair that with modal progressions, using scales like Phrygian or Aeolian, the music gains a darker, more chromatic character than ordinary major/minor progressions. This combination creates the heavy, punchy riffs and ominous mood that characterize the genre.

The other options point to styles or textures not central to heavy metal: blues scale solos and pentatonic riffs are more tied to blues and classic rock phrasing; acoustic ballads and gentle textures contrast with metal’s intensity; electronic dance rhythms reflect a different tradition with electronic production and dance-focused grooves.