Which of the following are literary devices used in literary nonfiction? select all that apply.

imagery
figures of speech
research
fact-finding

I believe the correct answers are research and fact-finding.
Nonfiction, as opposed to fiction, is not made up - essays, encyclopedias, manuals, instructions - these are all texts which would fall under the nonfiction category. Therefore, nonfiction is based on thorough research and facts in order to provide accurate information rather than resort to the use of figures of speech and imagery (which are usually avoided in nonfiction).