Final answer:
A primary source is original, firsthand information that hasn't been interpreted, analyzed, condensed, or changed. Examples include diaries, letters, government documents, photographs, speeches, and experiments.
Step-by-step explanation:
A primary source is original, firsthand information that hasn't been interpreted, analyzed, condensed, or changed. These sources are fact-based and provide a firsthand account of an event or period in history. Examples of primary sources include diaries, letters, government documents, photographs, speeches, and experiments.