Which of the following best describes a secondary source?

A secondary source is characterized by its nature of providing analysis, interpretation, or a summary of information derived from primary sources. It often synthesizes the findings of original research or firsthand accounts into a comprehensible format, making it accessible for readers who may not engage directly with the primary material. This type of source is crucial for forming a broader understanding of a topic, as it builds upon and contextualizes the original data or events documented in primary sources.

In contrast, original research or artifacts would be categorized as primary sources, which are first-hand accounts or direct evidence regarding a particular subject or event. Therefore, the choice that identifies a secondary source as a summary of primary data effectively captures the key aspect that distinguishes secondary from primary sources.