Answer:
the supporting details
Step-by-step explanation:
The details of support are a very important part of the thesis, because it is at this stage that the good references that will provide theoretical basis for the work will be gathered, but also dialogue with these references and apply their concepts in the thesis theme. For this reason, the supporting details are directly related to the thesis.
The introduction is related as a preview of what will be treated in the thesis, while the conclusion is the closure of the ideas that were presented during the work.