In "The Day I Got Lost", the writer explicitly states, "It is easy to recognize me. See a man in the street wearing a too long coat, too large shoes, and a crumpled hat with wide brim, spectacles with one lens missing, and carrying an umbrella though the sun is shining, and that man will be me." These details are an example of...
theme
direct characterization
setting
indirect characterization

normally working animals are domesticated and ruled by a master, a domesticator (tamer), to perform basic and important functions on a farm, for example. the value used in this context is animal labor in exchange for food. it is not so much a contrast to the story told by napoleon and the pigs, since the animals of that particular farm also performed functions on the farm through domestication. the only thing is that in this case, who rules them is a pig, also an animal, but very respected, to whom the other animals lent him submission. that's about a strong relationship of dependency between animal and owner.

"a" because he is appealing to logic as oppose to appealing to the audience's emotions.