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Answer: Ternary Form
Explanation: Ternary Form is a musical form that introduces an idea, (A) then introduces a contrasting idea, (B) then returns back to the original musical idea, often copying the first phrase how it was, maybe including some slight variation in the harmony or rhythm. A good example of a simple piece written in Ternary Form is Mozart's Andante in E-Flat Major.
e. pitch
People speak about "high" and "low" sounds quite unselfconsciously, as though they know that the latter actually have a low frequency-relatively few cycles-and the former a high frequency. The musical term for this quality of sound, which is recognized as pitch. Low pitches (low frequencies) result from long vibrating elements, high pitches from short ones.
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