What is Style?

I think that a style in writing is the way you write. Your word choice, the way you express yourself with writing and how you do so. Also it is sort of the theme you use, wether your writing happily (happy topic) or sadly (sad topic). How you want your reader to feel really defines your style if you want to make him feel sad you might choose a sad topic to write about, with complex words and good descriptions/detail. You might want to make the reader imagine and feel the pain that something or someone is going through (make them feel like they are a part of the story). This is my opinion on what style is!