Question

How can knowledge of the musical form ABA help you learn a piece of music?

Using labels like A and B to identify phrases also tells you which note to play.
Once you learn the first A section, you will already know enough to play two sections of the song.
All songs in ABA form use the same notes and chords for their melody and accompaniment.
ABA songs are easier to play, and therefore easier to learn, than other songs.

Answer 1

Once you learn the first A section, you will already know enough to play two sections of the song.

Step-by-step explanation:

This is the only one that really makes any sense. Ex: Twinkle Twinkle Little Star has two repeating A sections. One in the beginning, one at the end. I know it's late but someone will need this down the road.