While I'll give you the answers, you should really be doing your own homework. Especially on a topic as important as cyberbullying.
Answers:
1. Respond to mean emails or messages
2. Create a profile in someones name to say hurtful things to others
3. Some kids surveyed may not want to admit their experiences because they are afraid of the consequences
The first analogy is abstract. The second analogy is concrete. Shakespeare: plays:: Mark Twain: Novels; screen: computer:: face: watch. Sorry, I'm not sure how to prove the concrete/abstract part but I'm sure that I'm right.
The answer is: "Her mother had spent years learning to speak relatively good English…"
In the story "Bul-GO-gi!," Ji-Suk's mother best develops the theme that adapting to cultural change is difficult when it is mentioned that it took her ages to learn to speak English somewhat well. After coming from Korea, she found the language her most challenging obstacle. That is why she wanted her daughter to speak English well, attend a respectable university and graduate as a lawyer.