Research question and thesis statement
Most essays written at university, as well as research writing, need a research question and a thesis statement. Very briefly, the research question concerns the issue you investigate, whereas the thesis statement concerns the claim that you make in your essay.
In the video below, the two concepts are introduced, and you find more information and advice in the sub-pages
Instructional video from the free online MOOC "Writing in English at University" which was developed at Lund University in 2016.