In exchange for the food and clothing offered by Spanish missions, many different tribes agreed to show the settlers how to properly plant and cultivate crops, which was difficult for many settlers.
The most likely purpose is <span>to ensure that Ozamoto understands that he cannot return to his home in the exclusion zone
An area usually will be included as exclusion zone if it's contain something that would be really dangerous if spread to other area.
Examples of an exclusion zone is the area around Chernobyl after their nuclear plantation blew up.
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Im not sure what you're trying to ask