Answer:
ABA
Explanation:
The ternary form also kown as the music form is the style of writting where you have three stanzas, where your first stanza is A and then is followed by a B stanza, and then repeat the A, it´s ABA and it is most commonly used in music, the third section it´s not exactle the same, but it´s a variation of the first one, they often have the same rhyme scheme and the same tone, while the middle part often is different frmo the other two in rhyme scheme and tone.