Answer :
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In the context of a musical composition, the term used to describe a particular scale that dominates the music is "key."
Here's why:
1. **Key**: In music theory, a key refers to a group of notes centered around a particular pitch, known as the tonic, which gives a piece of music its sense of tonal center or home base. The key establishes the framework for the melody, harmony, and overall structure of the composition.
2. **Example**: For instance, if a piece of music is in the key of C major, it means that the notes and chords of the C major scale play a central role in shaping the musical elements of that composition.
Therefore, in the given options, the term "key" is the correct choice when describing a scale that dominates a musical composition.
