Ineed to write about homeless for my research paper. i wanted to write about causes that made homeless, problem of homeless, and the solution. do you have any ideas for the thesis statement? ?

It's pretty simple. You only need to focus on the reasons why people are homeless. Do they have good education? do they get better job? Or do they find ways inorder not to be homeless? Questions like that will help you determine why? and what can be the solutions inorder for them not to be homeless.