Answer: Generative
Explanation: Language is governed by set of rules which guides the speaker and may also the interpretation given to messages by the listener. The nature of a language may either br generative or prescriptive. The prescriptive nature according to Naom Chomsky argues that the set of rules and principle guiding a language resides in the human brain as an innate characteristic. Prescriptive often adopt a standard baseline for adjudging grammatical utterances as either right or wrong and usage description of a language is defined in its descriptive nature. The sentence create by Thorne in the excerpt above highlights the generative theory guiding the nature of language which defines the speakers ability to naturally produce and interpret language.