Instrumental accompaniments usually played unison with the vocal melodies in polyphonic music.?

In polyphonic music, instrumental accompaniments often play in unison with vocal melodies to enhance the harmonic texture and support the vocal lines. This practice creates a cohesive sound, allowing the intricate interplay of multiple voices to be more prominent. Additionally, unison playing can emphasize the melodic content, making it more accessible to the listener while still maintaining the complexity characteristic of polyphony. Overall, this interplay enriches the musical experience without overshadowing the vocal elements.