Which characteristics describe Gregorian chant?

The characteristics of Gregorian chant are accurately represented by the choice that highlights vocal monophony, nonmetric performance, and the use of Latin text. Gregorian chant is a form of plainchant that features a single melodic line without any accompanying harmony, which emphasizes its monophonic nature. The nonmetric quality refers to the free-flowing rhythm of the chant, which is not measured in strict time signatures like later forms of music; instead, it follows the natural flow of the text. Latin is the language traditionally used in Gregorian chant, reflective of its roots in the medieval Roman Catholic Church. This combination of features defines Gregorian chant's unique and historical role in the development of Western music.