What does major kovaloff believe happened

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

Plz change it i can not change this sentences .

Give two details about the social and economic climate of the 1930s. were these details noted in to kill a mockingbird