A diminished triad is characterized by which of the following?

A diminished triad is defined by its specific interval structure. It consists of three notes: the root, a minor third above the root, and a diminished fifth above the root. The minor third creates a tense, unresolved sound, while the diminished fifth (which is one semitone lower than a perfect fifth) adds to the dissonance associated with diminished chords.

This unique combination of intervals distinguishes the diminished triad from other types of triads. A major triad, for example, features a major third and a perfect fifth, while a minor triad has a minor third and perfect fifth. The diminished triad's distinctive sound is often used in music to create tension that can resolve to more stable chords. Thus, the characterization of a diminished triad as having a root, minor third, and diminished fifth accurately captures its essential qualities.