In "raymond's run," readers get an inside perspective on squeaky's thoughts and feelings.
which best explains how the author achieves this effect?
she uses third-person point of view.
she uses second-person point of view.
she uses first-person point of view.
she uses fourth-person point of view.

I am pretty sure that in "Raymond's Run," readers get an inside perspective on Squeaky's thoughts and feelings due to the fact that author first-person point of view. When the story is written in such a way it means that story is being described as if it is  being recorded by camera : you observe everything in your own way, and there is no appeal to the reader, just a story as it is. 

The author's purpose is to be persuasive