Based on Musical descriptions the Music where all 12 tones of the chromatic scale are of equal importance is called "atonal."
- This is because atonal is a form of music that has no central or key tone.
- This is one of the major characteristics of the dodecaphony or twelve-tone technique which was originally composed by Arnold Schoenberg.
- This style of music ensures all the tones have the same level of importance with no key tone in particular.
- Each of the twelve tones is called a semi-tone.
Hence, in this case, the correct answer is option D. Atonal.
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