The answer that looks the most right to me is Demonstrative.
For this essay, you could discuss the transition period of senior year. This is the last year that you will be at your high school before you and your friends leave for college, the workforce, the army, etc. After several years of taking courses with the same classmates and teachers, you have to say goodbye as everyone makes their own decisions and starts their own separate lives.
Sentimentality can <span>work against an author because it might cause readers to reject a story or its characters. Generally, it is considered a poor technique of bad writers, that shows the lack of taste. It is easy to employ, but it creates a shallow effect both on the plot and the characters. It used to be desirable in the 18th-century literature, but nowadays it is on the verge of kitsch.</span>
I don’t understand what is the poem
You should write the claim statement. It is very important.