Descriptive language. They describe things about that character.
Answer:
I believe it is "C".
Explanation:
I am not sure if this is right or not at all, but I have a feeling that it is "C" because both a Willow Tree and a Disease are Nouns.
The literary device used on the title of the poem "War is Kind" is the following:
A. Irony
Irony is the expression of one's meaning by using language that normally signifies the opposite, typically for humorous or emphatic effect. This idea of expressing the opposite of what is actually being said/wrote is present on the title: in this case, by the use of the word "Kind".