I think that the author uses mice to represent Jews because it showed what Hitler thought of them, that they were dirty, unwanted, and that they were not human. To back me up, on one of the first pages there is a quote that Hitler once said "The Jews are undoubtedly a race. But they are not human."Jews are represented by mice because they are seen as pests and should be exterminated. That is exactly what the Nazis were trying to do at that time. And Hitler managed to convince his followers that getting rid of them was the best thing for every one by using propaganda, and powerful speeches.
I think that Art Spiegelman wrote the book in the form of a comic book because sense it is a strong and at times confusing topic to read about, it makes it easier for the reader to actually understand and follow the story, because illustrations help imagine what is happening in a fun and easier way.
3) Why did the author decide to represent the Poles as the Pigs?
I think he decided to represent the Poles as pigs because, they were not a a threat to the Jews or to the Germans , they were just kind of on the side. I also think it is interesting because Jew do not think highly of pigs, but for the Germans it is a big part of their diet, so it is quite an interesting point of view.