Which term describes the research method used in the described observational design that involves forward-looking data collection without manipulating exposure?

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Forward-looking data collection in an observational study means you follow participants over time to observe outcomes without assigning or changing their exposure. That is what makes the study prospective. When the data are collected directly for the study by the researchers, it’s described as primary data. So a prospective approach that uses primary data best fits the described design: you’re watching outcomes unfold over time without manipulating exposure, and the data come from the investigators’ own collection. In contrast, retrospective studies use past records or recall, cross-sectional designs capture a single time point, and descriptive approaches don’t specify time orientation or exposure handling.