Answer:
Your poem is very good! I rate it a 9.5/10 because nothing is perfect.
Explanation:
Probably, think about what kind of ideas dewitt had and maybe think about what vigorous means properly before u give an answer. Hope that helped a little at least. Look up each word and concentrate on what they mean. Read more about him also.
The correct answer is their. Because his or her wouldn't make sense because it says they, his also wouldn't make sense for that reason, and the other form of there means for example, "over there"