Why might the spanish have felt it important to train the natives of california for a “european colonial society”?

Explanation:

This the only question that make sense, other options are just to kind. The reality is that Spain wanted only to exploit American's resources, they treated Natives as slaves, using them to extract silver and gold to send to Spain.

Also, religion was a problem, because the wanted to ''convert'' Native. So, at some point, they found out that it was easier if they convert them and teach them how to live in society, to make the submissive.

what terms are there?