The main melodic line which is represented in Doppio Movimento is referred to as a Disjunct motion and is denoted as option B.
What is a Disjunct motion?
This is depicted by a melodic phrase leaping upwards or downwards and usually has a greater movement than the whole tone.
In Doppio Movimento, from Appalachian Spring, by Aaron Copeland, the movement was twice as fast thereby representing a greater movement and disjunct motion.
Read more about Disjunct motion here https://brainly.com/question/2748259
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