Final answer:
Colloquialism refers to the use of everyday speech patterns in literature, differentiating it from formal prose, elevated language, and archaisms.
Step-by-step explanation:
Literature that is written in a style closely corresponding to the patterns of everyday speech is known as colloquialism. Prose that uses colloquial language tends to reflect the natural speech patterns of people and is often used to give a more realistic, approachable, or regional flavor to characters and dialogue in literature. It differs from formal prose, which follows a more structured and formal set of rules, and from elevated language, which uses high-level vocabulary and is often more poetic or flowery in nature. Archaisms, on the other hand, are outdated words or expressions that are no longer in common use. In prose, authors choose their words carefully to develop a personal style, and colloquialism can be a deliberate choice to make the text resonate more authentically with readers.