If another stanza were added to “The Caged Bird,” which excerpt could best be used to continue the extended metaphor?

The poem’s extended metaphor contrasts a free bird, which enjoys freedom, with a caged bird, which longs for what it cannot have. The caged bird sings fearfully about the things it craves beyond its cage, so “The caged bird sings with a fearful trill of things it craves outside the sill” best continues that contrast. The choices describing a “joyous song” or assigning the caged bird’s longing to the free bird do not fit.

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