Development is a type of change over a period of time characterized by orderliness, and often by law-like or predictable processes. Examples of development are: (a) evolution; (b) manifestation of potential; (c) human development; (d) societal development; (e) economic development; (f) a type of variation, in music, associated with the transformations of thematic elements; and (g) in literature, the movement of the plot or dramatic action, towards the climax; and generally change as an outcome of or randomness.