A because all the action is there
Answer:
It would be diaries as a primary source
We knew that Paleo Indians were in the Americas through the style commonly shared by individual groups called stone tool production. This lithic reduction tool adaptations were found throughout Americas. Paleo-Indianas as well were thought to have migrated throughout the Americas, showing variations of lifestyles across the geographic areas. There were even areas or sites noting this, for example in Alaska, northern British Columbia, and western Alberta.
