Question

Blank refers to the degree of complexity of one or more musical part that occur simultaneously

Answer 1

The term you're looking for is likely **"texture."** In music, texture refers to the way different musical lines or parts are combined to create a fuller sound. It describes the complexity of the interplay between these parts, which can range from a single melodic line (monophonic texture) to multiple interwoven melodies and harmonies (polyphonic texture).