What is amalgamation​

Wealth is greater than health prove

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

In the sentence above, which verb is the irregular verb? a. laid b. warmed c. removed d. walked