Answer: Both use everyday language.
Both Robert Frost's "Mending Wall" and Carl Sandburg's "Frost" use everyday language. This is their main similarity. This type of vocabulary allows them to convey their ideas in a way that is accessible to everyone. It is also a characteristic that sets them apart from other more traditional poets.
Expository text gets to the point rather quickly. It is intended as education rather than just narrative text. An example of narrative text is the Excerpt by Charles Dickens which is meant to draw a picture of what this woman was like.
So the last one is out.
The first one talks about volcanoes and how they are classified. That's one of your answers if you are trying for brevety and education.
I think the second one would also be a choice. It is trying to show you the nature of anxiety and what causes it. You learn a lot about symptoms from reading it. It's quick and to the point. Expository? Yes.
I don't think four is exactly expository, but I might be wrong. It sounds too argumentative to be completely expository. It wouldn't be my first choice even though I have read Twain a great deal, beginning in my teens. He always has something pointedly funny to say about the human condition. So it's hard for me not to include him in anything. It's not exactly narrative either. The tough ones are three and four.
Three tries to tell you what it would be like to live in another country. I think it likely is the choice you are looking for.
Answers 1,23. I could be wrong, so if you have a different answer in mind, go with it.
The answer is:
It shows that she can break the rules for her principles, revealing that women are as capable as men.
According to the excerpt from "The Royal House of Thebes," Antigone refuses to follow Creon's order not to offer burial to her brother Polynices. The reason is she believes it is the right thing to do and it goes against the God's law. Although her sister Ismene is afraid to disobey men, Antigone is not frightened and is competent enough to give her late brother a proper grave on her own.