Description is also the fiction-writing mode for transmitting a mental image of the particulars of a story.

Dialogue (sometimes spelled dialog in American English[1]) is a literary and theatrical form consisting of a written or spoken conversational exchange between two or more people.

Its chief historical origins as narrative, philosophical or didactic device are to be found in classical Greek and Indian literature, in particular in the ancient art of rhetoric.

Having lost touch almost entirely in the 19th century with its underpinnings in rhetoric, the notion of dialogue emerged transformed in the work of cultural critics such as Mikhail Bakhtin and Paulo Freire, theologians such as Martin Buber, as an existential palliative to counter atomization and social alienation in mass industrial society.

Represented speech is a stylistic device that may be used only in literature, when the author reports the thoughts of the character and it looks like thinking aloud.

Compositional form refers to how a musical composition is structured. There are many different forms in the world, and I'm not going to touch on all of them here; however, here are some examples of common forms:

Binary: AB

Ternary: ABA

Baroque: AABB

In these forms, the letters represent themes in a musical composition. So, for example, a ternary form has an opening theme, A, then a change in the middle to B, then ends again where it starts by using the theme A again. An example of ternary form is Chopin's Nocturne Op.55 No. 1.