Respuesta :
This structure helps capture the reader's attention by creating suspense about his best friend. If the signs his friend had been leaving in the beginning were subtle to the narrator, they might not appear as anything out of the ordinary to the reader either. Reading about a bunch of non-important things that the narrator's friend did might not do much to engage the reader or make the story seem interesting at all. By starting with a major revelation though, it becomes clear that the reader should pay more interested attention to even the little things that the friend does.