I think it would be an idiom or allusion. More towards an idiom though.
Answer:
- Check to see if it is the part of speech I need for my sentence
- Clarify the meaning of the word
Explanation:
Finding the longest, most academic word, does not mean it suits the sentence. You should check if it fits into the sentence properly. You should also check if it means the same thing, or else the sentence will not make sense.
The answer is
D. the topic of both poems is a battle.
