Imagery is the rhetorical tool writers use to creates mental images in a writer's mind by using descriptive words. Denotation and connotation are tricky but fun; denotation is the exact meaning of a word, while connotation is the mood it invokes or how it comes across. For instance, "tug" and "heave" have the same denotation or definition, but "heave" sounds a lot more laborious or hard, which makes gives it a different connotation.
Don't use my definition; make your own or look up the precise meaning in a dictionary, but at least that's a start.
You can find your own examples in the poem (you got this!), but here's a quick guideline:
For imagery, find a line or phrase that is so descriptive, you can almost see it.
For denotation and connotation, find two words whose meanings are similar but that take on different tones.
As for supporting your answers with the Declaration of Emancipation, you'll have to do your research. I'll help clarify, but ultimately, the answer's yours :)
The link below is a great one for predicate pronouns:
http://classroom.synonym.com/predicate-nouns-predicate-pronouns-8597110.html
To be honest, I'm not skilled in predicate pronouns, so don't take my word for this. What I WILL do, however, is give you a good test-taking tip that could help you narrow down your answer:
All four answer choices contain the phrase "the winners of the contest", so you know that if the predicate pronoun were in *that* phrase, all four answer choices would contain it. To simplify your answer choices, replace that phrase with a placeholder (I'll use x):
Justin and Meg are x.
X are they.
X are Justin and Meg.
X are excited.
Here's another tip: If you look at options one and three, they're the exact same sentence, just switched around. There are no words added or taken away, so either they're both right, or they're both wrong. That leaves your options as these:
#2. The winners of the contest are they.
#4. The winners of the contest are excited.
The only difference between these two are that one contains a pronoun (*hint hint hint*) and the other contains an adjective. Once again, I'm not familiar with predicates, but go with your gut on this, and good luck!
Your question is very interesting and at the same challenging. I researched it and it has very interesting origins: http://time.com/4597964/history-charles-dickens-christmas-carol/
In general ''A Christmas Carol'' was written for practical reasons and with nostalgia. A Christmas Carol helped Christmas to be child-centered. Dickens's novel also allows us to have a vivid mental image of snow and the horrid cold on London streets in late Dec and he associates Christmas with ghosts. Dickens's tale is highly moral in tone has a religious conception of Christmas. And while I was at it I found what were the Origins of Christmas, Halloween, and Easter. Here is the link: JW.ORG
Mann they are just awesome and cool