Answer:
Monophonic
Step-by-step explanation:
Medieval music was around 500 A.D. to 1400 A.D., it involves songs, instrumental pieces, and liturgical music that are popular in church, secular music, non-religious music.
Majorly, medieval music is based on vocal music, such as Gregorian chant and choral music, basically, instrumental music, and music that uses both voices and instruments, such as Gemshorn Alt (flute) made of wood.
Hence, during this period, the musical texture was characterized by single melodic line, making it monophonic in nature, such that composers kept the melodies pure and simple.