The author lists all of the following as reasons for the decline or disappearance of a language EXCEPT:
Explanation:
Third paragraph states - "Speakers of previously exclusively oral tongues are turning to the web as a virtual space for languages to live on. Internet technology offers powerful ways for oral traditions and cultural practices to survive, even thrive, among increasingly mobile communities."
Widespread use of internet has led to documentation of all kings of languages, hence option (a) contradicts the passage.
Hence, option (a).
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