Concept:Puck (Robin Goodfellow) imitates the voices of the lovers in order to mislead them during the quarrel.Explanation:Speaker Y is not an actual third person on the scene.Puck throws his voice so that Lysander and Demetrius cannot meet and fight.The lines of Speaker Y, especially "Come, recreant..." and "I'll whip thee with a rod," are spoken by Puck in the voice of Lysander.These words are meant to provoke Demetrius into chasing a false sound.Answer:D. Lysander