Answer :
Tonality is the principle of organization around a central tone.
Option C is the correct answer.
What is tonality?
This a term used in music to refer to arrangement of other tones and harmonies around a tone. The tone that is the focus of the arrangement is usually called the central tone.
An instance of tonality as used in music is the pitch of a one's singing voice. This is an important concept in music and helps in getting appropriate harmony. Hence we can say that tonality is the principle of organization around a central tone
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