All of these could be considered an "author's purpose". An author is technically anyone who writes anything, therefore the purpose of writing is theoretically limitless. If you have to choose one of these, however, it would be "to remind".
Since diction in writing refers to the choice of words, the answer is A - strategic word choice used in persuasive rhetoric.
Answer: precaution
Explanation:
You didn't give the word to be arranged but based in the hint you gave, the answer to the question should be "precaution".
Precaution refers to the measure that is taken in advance so as to prevent the occurence of something unpleasant or dangerous, from happening. It is a foresight that's taken beforehand in order to prevent harm.
