Why is the poem Because I could not stop for death by Emily Dickinson one long extended metaphor?

Ihave no idea what the explanation is.

After reading the short story "the most dangerous game" by richard connell, write an article on the main character of the story by relating the main events through his eyes. cite specific quotations from the story in the intreview

Look at the five words you selected to study during this lesson. use the second one in an original sentence. in a second sentence, explain how you have used or seen this word in your daily life. use proper grammar and spelling. note: you must write your own original sentence to receive points for this question. my word is flabbergast