Which of the following describes what data fields contain?

The correct choice describes that data fields contain a set of data for each participant. This means that within a dataset, each participant (which could refer to individuals, organizations, or any unit of analysis relevant to the research) is represented by multiple data fields. Each of these fields can hold different types of data that correspond to various attributes or responses from that participant. For example, in a survey dataset, one participant's data may include fields for their age, gender, income, and responses to questions, presenting a comprehensive view of that participant's information.

In this context, it’s important to recognize that while numeric and textual data are types of data that might be present in these fields, the essence of the correct answer focuses on the collective set of data from each participant rather than limiting the type of data or format.