My hub is about why doing research is important. It is not about how to write a research report and its different parts. This could be a good topic for a future hub though, so thank you for asking.
Please consider looking for information related to research report writing that is posted on university-based websites. These are both useful and authoritative sources of such information. However, research report format, including main headings and subheadings, varies from one organization to another. You may choose which among the available options you would like to adopt in your research report.