I believe it's an Indefinite pronoun. Hope this helps...
You characterize it by antagonism.
It's humble. I just looked at the book. He is humble compared to the giant pig named 'Uncle' so that is what Charlotte wrote in her web.
I would say C probably. the text sort of explains how each decade is different from the previous one, but it doesn't seem to really show a strong "cause and effect."
sorry I wasn't very helpful.
False. A lot of time the more slang you use in a letter, the less intelligent the writer seems.