Final answer:
Secondary sources are written or created after the time period under study and provide context and perspective on historical events.
Step-by-step explanation:
A secondary source is one written or created after the fact. It provides context and places a topic in relationship to others of the same era. Secondary sources include documents, objects, or other source material written or created after the time period under study. They are critical for the evolution of historical knowledge and are often the place students begin to form an understanding of past events.
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