A topic is what the paper is about, a theme is sort of how a story is set. For example, maybe my topic is danger, so I use that through the theme of snow
Answer(s):
1.) Increased awareness of the dangers of ocean pollution are creating interest in Pozzi's art.
2.) B - "She now has...requests from overseas."
I hope I got these, I skimmed through the article...
A little tip, my eigth grade english teacher taught me this a long time ago, but the longest answer (especially when it pertains to an article) is usually the right one.
I think that 4 should be C