Answer:
truly perplexes them.
Step-by-step explanation:
Expository essays requires thorough research and evaluation of a particular topic which provides a good argument regarding the topic at the end.
It requires full attention in unfolding the problems of a topic as the writers must provide a concise argument at the end.
Therefore, the person who tries to write an exploratory essay must always choose a topic that truly perplexes them. They should challenge themselves in learning and unfolding the truth about the subject.