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.

you really need to put more information in your (question); /// i believe you are talking about ///creek traveler"s rest, about lewis and clark not good

both believe in many god or polytheism

both built temples that they worshiped in both civilization's god were humanoid

both groups made religion a large portion of their lives

both believe in one religion throughout

the dead were buried with items for the afterlife