Thesis on "Homeless people due to lack of afforable housing" ?
In any thesis you want to make a clear stance on the topic you are writing about. Here you want to include a thesis in your introduction that states why you think individuals are homeless and how the lack of housing relates to this. For example "The lack of ability to afford housing on mimimum wage has led to an increase of homelessness in America." You will then want to support this with research articles that focuses on the mean income in America and the mean cost of housing in America.