The term that refers to the baroque music principle in which one affection, such as grief or agitation, is represented throughout a work is:
Unity of mood is a principle in the baroque music style that repeats one emotion throughout the course of the music. This is often characterized by the repetition of a rhythmic pattern or a melodic pattern.
These sorts of music often convey the emotion being expressed strongly. The reader is able to get the emotion expressed clearly. So, the correct option in this instance is option D.
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