Hi Michelle,
As Rhys said earlier, surveys do not map data, so there is no connection between the fields on the recipient's record and the survey questions they submit. The Email Component he referenced basically appears as a survey question asking for their email address. If you put this component onto your survey, it will automatically associate the survey submission with the person that submitted it.
See section 6f of this help article for additional information on the survey email component: http://help.clickdimensions.com/creatings-a-clickdimensions-survey/