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Step-by-step explanation:
Plainchant music is also known as plainsong and it refers to a traditional ritual singing of the Western Christian Church. It started its own development during the first centuries of Christianity. It is characterized by a single line of vocal melody (unaccompanied), Latin is the language used for it, the rhythm is free, and modes are used instead of major or minor scales. Cantus planus is its name in Latin.