Which process by both a historian and archeologist in their work

Both use hard evidence to sustain their work.

Explanation:

Hard evidence is, in a nutshell, a physical item. This type of evidence is used to give to these professionals the first glimpse of society, and is trustable because can be seen and touched, but doesn't offer a full comprehension about the past. After a deep analysis of the artifacts, these professionals use another resource, such as literature, oral history, and iconography (images) to fulfill the lack of information.

ottoman, safavid and mughal all in order