The correct option is A. Changes in volume in a composition called Dynamics.
Dynamics are shifts in a musical passage's volume. Each note sounds different at various volumes just as each note on each instrument has a distinct timbre.
Tempo can be defined as how quickly or slowly a piece of music is played, whereas rhythm is the placing of notes in time in a predictable pattern. Since the beat is the fundamental unit of time in music, the tempo is typically expressed as the number of beats per minute.
Dynamics refers to the appropriate volume or volume range for a piece of music. The usage of dynamics is a prominent aspect of your performance because they are a key means of expressing a piece's mood.
Thus, The term "dynamics" refers to music volume. It specifies how loud or softly a musical phrase should be played. I'll go through music dynamics and the most significant dynamic cues in the sections that follow.
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