Answer:
Movie about Gettysburg
Step-by-step explanation:
Primary sources are those that provide a first-hand account of a particular event or time period. These are particularly important to researchers because they provide information that is original and as close to the event as possible. On the other hand, secondary sources are those that interpret, synthesize or analyze primary sources. In this example, the Gettysburg Address would be considered a primary source, while a movie about this would be considered a secondary source, as it examines a primary one.