A primary source is an original document or artifact that provides direct evidence about a historical event, person, or phenomenon. Examples include letters, photographs, diaries, official records, and artifacts. These sources are created at the time of the event or by individuals directly involved, making them valuable for research and understanding the past. Researchers use primary sources to gain firsthand insights and perspectives. For instance, a diary written by a soldier during a war offers unique details about their experiences, while a photograph from that time captures visual evidence of the events. Analyzing these sources helps historians construct accurate narratives.