Please i need help. Which keywords and phrases in this author's purpose indicate that the author should use a descriptive essay structure? Saving endangered languages is a difficult job. Many languages have very few speakers left. For instance, the Central Pomo language of Northern California has fewer than 10 speakers left. Linguists have been working tirelessly to record and preserve these languages through various techniques, including video recordings, structural recording of grammar and syntax, and so on. In a few instances, linguists have tried to save languages from becoming extinct. For example, the Quichua language of Ecuador is the focus of linguistic preservation efforts.

which one?

difficult, For instance, has fewer, record, For example, focus