Answer:
The author's purpose is basically the reason he or she chose to act in a particular way, whether that's writing the passage, selecting a phrase, using a word, etc. It differs from the main idea in that author's purpose not the point you're supposed to get or understand; rather, it's the why behind why the author picked up a pen or selected those words in the first place. It can be difficult to determine because, after all, you may not be inside the mind if the writer.
Explanation:
