for the survey I am building, I would like the participate to have to provide comments if they select a radio button that is valued at 2 or lower before moving on to the next survey question. how can i build this into the survey process?
This is easy to do. However, there are several steps involved, and some of them depend on other factors within your survey, so it is difficult to give you an exact answer.
I think that your best approach would be to review the SurveyGizmo documentation on question logic – https://help.surveygizmo.com/help/article/link/setup-question-logic
This article includes a video tutorial that explains in detail how to setup the question you want.