I am 95% sure it is the geography and climate of the area where they settled. If you take a look at different native groups, you’ll see that the most prominent factors are their farming/hunting and housing styles, both affected mainly by the climate and geography surrounding them.
Answer:
Apply for a US passport.
Explanation:
Passports are only necessary if you are traveling out of your home country.
The answer is: Islam became the main religion
