McKay personifies America as a woman who feeds him "bread and bitterness" and who sinks her "tiger's tooth" into his throat. By using the pronouns she and her to refer to America, McKay turns the concept of a country into a person who can cause the narrator harm even while he loves her. The effect of this personification turns the relationship between the narrator and his country into a more personal relationship, full of the conflicting emotions that come along with loving a person.
Answer:
He thinks up new poems using the words on the poster
This is an instance of dramatic irony, taking into account that this figure of spech is when the implications of a situation, speech, etc, are understood by the audience but not by the characters in the play.
Early poems were written in meter first of all to distinguish them from prose, from everything written like a text.
Also, usually these poems were sung as songs, using various musical instruments, so meter was important when it came to rhythm.
