"Heard melodies are sweet, but those unheard are sweeter" - Identify the poet:AW.B. YeatsBThomas GrayCRobert FrostDJohn KeatsAnswer: D. John Keats Read Explanation: The line “Heard melodies are sweet, but those unheard are sweeter” is from Ode on a Grecian Urn written by John Keats.This poem reflects Keats’ idea that imagination and eternal beauty (the “unheard” melodies) are more powerful than physical reality. Read more in App