Answer:
The answer to Part A would be Ignorant, as the author goes on to state that his youthful understanding had struggled in vain. If someone is ignorant of something, yet they do not take the time to actually go research or learn about that thing, then they would be struggling in vain because they are selfish and not taking time to research what it is that the other person is saying that they do not understand.
For the answer to Part B, I would say that (Frederick) Douglass' new awareness of how owners maintain control over slaves allows him to better understand how to improve his situation. I say this because he seems to have an awakening/epiphany in the very last line: "I now understood what had been to me a most perplexing difficulty".
Explanation:
I hope this helps!
All the first points you have written are true, but there is si much more you could say...
It can provide information quickly to large groups of people, and has allowed the world to become more connected; through businesses being able to communicate globally from HQ to factories or family members being able to skype or IM from one side of the world to another.
The internet brings us all together really, its interactive and lets people have their say, overall it's a worldwide community. Other forms of media simply don't have this to such an extent, and so thats what I guess makes the internet stand out!
Think about how you use the internet, whether it be social sites like facebook or twitter, or creative sites like pinterest or tumblr. You could also include these thoughts in your answer!
I hope this helped! Have a nice weekend :))
SORRY IF IM WRONG! (i used my OWN mind!) I put the ones i know
2. emphatic
3.falter
5.verge
6.prolonged