As it relates to an Institutional Review Board (IRB) application can you specify what goes in the Study Intervention section when there is only a survey and no clinical trials? Do you have any example(s) of a written outline

As it relates to an Institutional Review Board (IRB) application can you specify what goes in the Study Intervention section when there is only a survey and no clinical trials? Do you have any example(s) of a written outline. I am told that the intervention section must include a narrative of the literature review. Also, based on my hypothesis from the literature review, explain how I anticipate the independent variable is acting on the dependent variable. In short, can you explain how I can best outline this when it is survey based with no clinical trials?