Answer:
Extended metaphor.
Explanation:
An extended metaphor is a metaphor employed at the lenght of the poem, using various subjects, images, ideas and situations.
Extended metaphors are commonly used by authors to compare the recurring situation in a poem or prose with more complex ideas, in the form a metaphor.
At first, the context of both the main idea and the metaphor may seem completely distinct; the objective is to engage the reader into making an effort to understand the true meaning of the piece of text by making comparisons.
