What describes prose effectively?

Prose is best described as written language that does not have a metrical structure, meaning it does not follow a rhythmic pattern or line breaks as found in poetry. Prose is characterized by its use of everyday language and is often used in novels, essays, and short stories. This form of writing allows for a more conversational style, making it accessible and relatable to readers.

In contrast, the other options do not accurately capture the essence of prose. A structured form of literature implies a predetermined arrangement, which is more reflective of poetry or specific genres. Mentioning a type of dramatic device incorrectly narrows prose down to a theatrical context when it can encompass a broader range of written works. Lastly, categorizing prose as a specific genre of poetry is misleading, as poetry is defined by its form and rhythm, which prose intentionally avoids. Hence, the definition of prose as written language without metrical structure clearly distinguishes it from other literary forms.