5.  An interview with a survivor of a natural disaster conducted 20 years after the event.*1 pointPRIMARYSECONDARY

In this context, the data collected from an interview with a survivor of a natural disaster conducted 20 years post-event can be classified as follows:

1. Primary Source: This is a first-hand account that provides direct evidence or original data regarding the event. Since the interview is conducted directly with a survivor who experienced the natural disaster, it falls under primary sources. The interview captures the survivor's personal experiences, emotions, and insights regarding the disaster.

2. Secondary Source: This involves interpretations, analyses, or summaries of primary sources or events. If someone were to analyze, interpret, or report on the findings from this interview, that work would count as a secondary source. However, the original interview itself remains a primary source.

Final Answer

The interview with a survivor of a natural disaster conducted 20 years after the event is classified as a Primary Source.