In which form of music does a soloist sing a traditional melody while two or three additional singers sing complimentary melodies?

solfege

organum

plainchant

madrigal

madrigal

Explanation:

The madrigal expresses the main ideas and feelings of the so-called shepherd songs. Its form is different from conventional poems and its content can be related to the expression of lyrical feelings and ideas of strong emotional content, with select vocabulary, or to themes of pleasant inspiration.

Madrigal because it is usually a 4 part split