Final answer:
Investigators in 'Life of Pi' prefer the realistic story without animals for their report. Readers consider the logic, credibility, and omitted points in evaluating the stories presented. The novel uses a first person narrative, embodying elements of Realism and Naturalism.
Step-by-step explanation:
In the novel Life of Pi by Yann Martel, the investigators use the more credible and realistic story for their report, which is the version without animals where the survivors are humans. This narrative is in stark contrast to Pi's initial story, which includes a Bengal tiger named Richard Parker, and other animals. The human story is accepted by the investigators because it seems more plausible despite lacking the enriched symbolism of the animal story.
In assessing the evidence and the story's logic of the position, readers may weigh the credibility and relevance of points the writer includes or omits. The real challenge lies in whether one accepts the fantastical elements of Pi's tale or leans towards the more rational, albeit darker human story.
The novel's narrative perspective is primarily the first person "I" as Pi himself recounts his journey. Ultimately, the stories represent elements of both Realistic and Naturalistic fiction, where one highlights human survival and cruelty, and the other, the brutality and beauty of the natural world intertwined.