Historians use evidence to support their claims. This evidence comes in the form of:
* Primary sources: These are firsthand accounts or original materials from the time period being studied. Examples include diaries, letters, photographs, government documents, and artifacts.
* Secondary sources: These are interpretations of primary sources by historians, scholars, or other experts. Examples include books, articles, and documentaries.
Historians carefully analyze and evaluate evidence to build their arguments and reach conclusions about the past.