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".
ABBA is the answer because it includes a rhyme scheme in the poem
This phrase for the Queen suggests that the Queen is the ruler of all the empires but when she sees her own men who were fighting for her glory and rule injured, she becomes a nurse to them and brings them back to health.
