Respuesta :
Maybe it's to convey a scared tone? So then it's more realistic since Jem is obviously too scared to think in full sentences.
Answer:
communicate Jem's anxiety
Explanation:
It is likely that the reason why the author uses short sentences is because she wants to communicate Jem's anxiety. Jem is very nervous about the fact that somebody could be reading his mind. He wonders whether this is possible, and asks Scout for her opinion. We know he is scared because he shuddered. However, we also know he is worried because he talks in short sentences, which implies that his mind is in a rush and going through several thoughts at once.