Theories give you a basis of previous knowledge to work from. Theory is used used to craft the null hypothesis, which is either proved or disproved by the research itself.
A research question is the question that you need to answer for making successful research paper. In other words it's main theme of your research paper.
The main purpose and role of research is to help plan and gather information on a certain topic before carrying it out .It helps to test and create a theory on a certain thing and with the...