WordNet sense 1 ((biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level):

growth, maturation, ontogeny, growing, ontogenesis

WordNet sense 2 (a process in which something passes by degrees to a different stage (especially a more advanced or mature stage)):

evolution

WordNet sense 3 (processing a photosensitive material in order to make an image visible):

developing

WordNet sense 4 (the act of making some area of land or water more profitable or productive or useful):

exploitation