What is a cost centre

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

Which word best describes the tone of this excerpt from daly's sixteen

What causes cassius to delay killing caesar? a. the crowds around caesar b. a violent storm c. brutus’s reluctance d. the disorganization it the resistance