Read the stanza below from "Caged Bird" by Maya Angelou (also included in your reading packet).
"The free bird thinks of another breeze
and the trade winds soft through the sighing trees
and the fat worms waiting on a dawn bright lawn
and he names the sky his own
But a caged bird stands on the grave of dreams
his shadow shouts on a nightmare scream
his wings are clipped and his feet are tied
so he opens his throat to sing."
What is the primary technique used to develop this stanza and this poem?