1.) Persuade, Inform, Entertain, Explain, or Describe
2.) how purpose changes within a text.
3.) To understand the author's perspective or point of view means that you have to look through the the eyes of the writer. The author's perspective is his or her attitude toward the topic. In other words, the author's perspective is what the situation looks like from where the author is standing.
Point of view is important in a story because it helps the reader understand characters' feelings and actions. ... With an omniscient third-person, we can see everything before other characters do, which gives us forewarning about other events.