Other issues impacting homelessness e.g., economic (low wages, cost of living, eviction, foreclosure, etc.), lack of medical care, mental illness, addiction, and more. Each of these issues have their own sets of answers to the Reseach Questions.
Also, this issue is contained in at least one other issue. Homelessness is one dimension of the broader issue of housing, which has its own sets of laws, regs, organizations, coalitions, etc.