I think the correct word is, “is”!
Answer:
C.
Explanation:
The topic that should be used for literary analysis has to be the technique used by an author to convey the theme.
Literary analysis can be defined as a careful study of a text or literary piece to understand the author's choice, interpreting the meaning of the text, etc.
While analyzing a literary text, the topic should be the techniques that the author has used to deliver the theme of the text. In the given options, the one that fulfills this criterion of literary analysis is in option C. The elements of metaphor that the author has used and conveys the theme should be the topic.
Therefore, option C is correct.
