Answer:
Plagiarism applies when ideas are copied; <u>copyright violation</u> occurs only when a specific fixed expression (e.g., sequence of words, use of an image) is copied. Avoiding plagiarism is about properly apportioning intellectual credit; copyright is about maintaining revenue streams.
Because the main character is trying to describe her personal experience through the hard time she was going through.
:-)
I assume you mean a simile. A simile is a comparison made by using the words like or as: "Her hair was as gold as a lion's mane", "His beard was like tiny wires brushing her skin."
When asking a question, it's good to provide as much information as possible. If you can provide the paragraph in question, I can edit the answer to address your specific question.