what does Darth Vader say after Luke says to Vader, "he told me you killed him" in empire strikes back?

Which pair of uses of figurative language from "the caged bird" support the extended metaphor of freedom versus oppression? back of the wind; floats downstream his wings are clipped; his feet are tied the caged bird sings; the free bird thinks dawn bright lawn; grave of dreams

Is "ing" an unstressed or stressed syllable?

Which of the following story descriptions most directly shares themes with the passage above