Explanation: a metaphor is a direct comparison between elements that aren't obviously related, it doesn't use the words "like" or "as" to make the comparison, and it is used to create an mental image in the readers or audience, for example: she thinks life is a fashion show. Similes and analogies are also comparisons, but similes use the words "like" or "as" for example: life is like a fashion show, and analogies only compare specific characteristics of two or more elements for example: this movie is a rollercoaster of emotions.
I'd say that the <span>stylistic elements responsible for the stately yet economical effect of these lines from a poem are A. syntax, imagery, and allusion. There's definitely syntax, because it refers to these short lines. And since I don't see any irony here, I'd choose A. </span>