I am interested in Dead languages, for instance: how do languages become endange

I am interested in Dead languages, for instance: how do languages become endangered? Why should we care? their importance in the sociolinguistic field, what are the effects of language death?
What should your proposal include?
Your proposal is your statement of research plus a literature review and should be 3-4
pages in length (12pt font, double-spaced, Time New Roman, 1” margins). It can involve
a critical review of literature discussed in class, an application of class content to analyze
other linguistic data, or an analysis involving your own life experiences (if you are
comfortable). Your proposal should include the following:
1. The topic you are interested in
2. The research question you intend to address
3. Theoretical framework that will guide your discussion
4. Proposed methods for data collection and analysis
Comments from Customer
Discipline: Sociolinguistics