Notes played at the same time that don't sound good together.

• A. Harmony
• B. Rhythm
• C. Dissonance
• D. Chorus

Answer: (C)

Notes sounded together that feel tense or unstable are described as dissonance. Dissonance is the sense of clash or roughness that invites a move to a more stable, consonant sound. It’s all about how certain simultaneous pitches interact to create tension in harmony, rather than about rhythm or a specific grouping of singers.

For context, harmony is the broader idea of how multiple pitches sound together across chords and progressions, which can be pleasant or tense but isn’t defined by a clash itself. Rhythm concerns timing and pattern of notes, not the vertical sound of pitches. A chorus is a group or section of singing, not the quality of the simultaneous tones.