Realistic fiction is a genre consisting of stories that could have actually occurred to people or animals in a believable setting. These stories resemble real life, and fictional characters within these stories react similarly to real people. With a tragic ending or beginning grabs the appeal of others, like in the movie Spiderman how uncle Ben dies. That is Tragic Realistic Fiction.
In the first two sentences, Sinclair implies that the meat industry is very corrupt. He is preparing to reader for his accusations against the industry