What is used in nonfiction to support arguments?

Allusion refers to a brief and indirect reference to a person, place, thing, or idea of historical, cultural, literary, or political significance. While allusions can enrich a text by connecting to broader themes or concepts, they do not provide empirical support for an argument. Instead, they rely on the reader's familiarity with the referenced material, which does not substantiate claims in the way research studies do.

Imagery involves the use of descriptive language to create vivid sensory experiences for the reader. While effective in evoking emotions and painting mental pictures, imagery does not offer factual support for arguments. It serves primarily to enhance the narrative and engage the reader's imagination rather than to substantiate claims with evidence.

Dialogue represents the spoken exchanges between characters in a text. Although it can serve to reveal character motivations or advance the plot, it does not provide concrete evidence or factual support for arguments. Dialogue may illustrate points or themes but lacks the authoritative backing that quoting research studies offers in nonfiction writing.