How does Norris construct McTeague as a sympathetic character? What literary strategies does he employ to make this character interesting throughout the entire novel?

MCTEAGUE by Frank Norris is the book name also my professor said “Remember that you need to be writing about the authors strategies of composition, not what happens in the story.  Also, dont be declarative throughout your writing.  Let your readers see how the written text contributes to forming your views and let them see that you are focused on identifying and elaborating the writers methods of storytelling.”