Jazz scores are musical compositions written specifically for jazz ensembles. They often feature improvisation and syncopated rhythms, and are usually composed by a bandleader or arranger. The term 'baskets' is used to refer to the sections of a jazz score, which are typically divided into four parts: melody, harmony, rhythm, and solo. Each section contains its own unique set of notes and chords, and when combined, create the overall sound of the piece.