Final answer:
The survival of Europeans brought diseases that devastated the indigenous populations and led to the fragmentation of their societies.
Step-by-step explanation:
The survival of Europeans changed the lives of the people of the Northwest coast in several ways. One significant impact was the introduction of diseases by the European settlers, which devastated the indigenous populations. Diseases for which the Native Americans had no immunity led to high mortality rates, especially among the very young and old. This resulted in the loss of knowledge, traditions, and future generations for the indigenous communities.
Another consequence of the European presence was the fragmentation of the Native American societies. The influx of Europeans and the suppression of indigenous social structures led to the disintegration of their social networks and the weakening of their tribes.
While the arrival of Europeans did not introduce advanced agricultural techniques or improve trade relations, it did have a profound negative impact on the indigenous cultures of the Northwest coast.