Answer: essay and a novel
Explanation:
Prose is a form of writing that consist of no formal metrical structure as it is made of a natural flow of speech, rather than being rhythmic like in a poetry. Examples of prose include letters, essays, novels, short stories, journals, editorials, and articles.
The longest types of prose are essay and novel. An essay is simply a written piece which presents an idea, or express an emotion. A novel simply means a lengthy narrative. A novel is a narrative fiction which tells a particular story.