Final answer:
Chant and organum are both types of medieval music forms with sacred origins. Chant is monophonic, while organum is polyphonic.
Step-by-step explanation:
Chant and organum are both types of medieval music forms. Both chant and organum have sacred origins and were used in religious ceremonies and services. Chant, also known as Gregorian chant, is a monophonic genre of music with a single melodic line. Organum, on the other hand, is a polyphonic genre that developed during the high medieval era. It features multiple melodic lines sung simultaneously, often with the added use of drones or sustained notes.