Answer:
The correct choice is ''The independence and equality of concurrent melodic lines''
Explanation:
The melody is the orderly and coherent linear succession of musical sounds of different height that form a structured unit with musical sense, independent of accompaniment. The Polyphony refers to a type of musical texture in which multiple different melodic voices simultaneously sound (which are independent of each other), occurs when there are several equally important voices. In this way, despite of the independence of each sound, the listener perceives them as a whole (as an equality of melodic lines) but which are independent of each other.
