How were the native people of Washington State impacted by the arrival of early settlers, such as fur trappers, missionaries, and pioneers? They suffered from new diseases that caused many deaths and a population decline.

They were forced to move east in search of land and new economic opportunities for their people.

They welcomed the new arrivals and were able to successfully integrate them into their society.

They were presented with agricultural knowledge, leading to a change in their lifestyles.

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The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.