Melody, Rhythm, and Harmony
Melody is the tune you hum; rhythm is the pattern of beats; harmony is the chords that support the melody. These elements create a predictable structure that our brains can easily chunk and remember.
Chunking in a Song
In 'Twinkle Twinkle Little Star,' the melody repeats in a pattern (A-A-B-B-A). This repetition and structure make it easy to remember the whole song as a few chunks rather than many separate notes.