What the author means by stating, "Many other users interacting online are content to stay within the confines of their familiar social networks," in the first article (Anti-Social Networks? We're Just As Cliquey Online).
DAILY DOUBLE!!!!
If you got it right, you get 600 points!
Why is to introduce the idea of distracted teens and what scientists think the cause of their distraction is and give a little bit of background on the topic so the reader has some knowledge on what the rest of the article will be about/like?
Why is to clarify what they mean about how Facebook only allows you to see things you have an interest in in the previous paragraphs and transition into the next paragraphs, which are about how a TV show was brought back because of social media?