C. Surroundings would be your answer. Heights can also be an answer, but they want the exact more direct answer, so C.
Hope this helps.
Answer: C
Explanation: They are treated evenly and in a very matter-of-fact manner.
apex:
If all of the actors in the production were children, it would convey a feeling of innocence.
Huck's sense of morality is developing throughout the novel. He isn't always sure as to what's the most moral thing to do, but he constantly thinks about it and turns the issue over and over in his head. And his position isn't light; he doesn't have anyone in his nearest family who would be his role model. So, he basically has to do it all alone. On the other hand, the Duke and the King are two swindlers who are everything that Huck himself could grow up to be if he weren't guided by his inner moral compass. In this way, Huck is both an inverted younger version of them, and their complete opposite. Through them, he is going to learn what he shouldn't aspire to; but also, they teach him (unintentionally, of course) what he could become.
The detail that supports an argument that technology brings some teens together because it improves their social lives is “[f]ifteen to 30 percent of teens . . . reported feeling less shy, more outgoing, more self-confident, more popular”.
The paragraph starts with the topic, first, it refers to teens who do not feel social networks change their social lives. Second, it refers to those who claim social media has a positive effect on their social lives and, finally, it refers to those teens who feel social media has a negative impact on their lives.
The sentence “[f]ifteen to 30 percent of teens . . . reported feeling less shy, more outgoing, more self-confident, more popular” belongs to the second aspect described. That is to say, it is supporting the claim about the positive impact of social media in teens' lives.
The other options are not correct because the first one is the topic sentence, and the last option is a negative effect of social networks on teens' lives.