Answer:
What was the population density of the region.
Step-by-step explanation:
In process of elimination, the materials available are the ones that are found. The items found also show how the people lived, were they rich or poor? The items found can also show what the people valued, how many of these items were found? Were they found in protective casings or close to people's homes? The population density is harder to find based only on artifacts and is therefore the least likely.