It could be three of those questions but I personally would put it is unlike the weather in Vietnam
When I go away from you
The world beats dead
Like a slackened drum.
Apostrophe - Talking about someone away from them
Simile - Comparing the world beating dead to a slackened drum
Because water is the source of life and we need It to live we waste it but maybe somebody poor might need it
The book that first brought recognition to Mark Twain was :
c) Tom Sawyer