A structual element for a poem would be stanzas. Hope this helped you a bit.
Answer:
I believe the title 'Mask' is a symbol for how each individual hides themselves; we all have a mask, a front if you were to say, a shield in a sense. We hide ourselves under this mask because we are uncomfortable and scared about what society and the common norms have to say about us. Humans are afraid to be judged.
The sentence that contains an error in punctuation is the sentence, "I've left my book at home," said Emily.
There should be quotation marks before and after what Emily says.
"I've left my book at home", said Emily.
Typically, in expository passages, the author's purpose is to inform or teach the reader about a topic.
