Answer:
underestimating the variability of behavior from situation to situation
Explanation:
For the answer to the question above, the obstacles that an immigrant he/she might need to overcome are,
Leaving friends
Leaving family members
Embracing new Religion especially if you are migrating to Eastern Country or where the majority's religion is Muslim.
Finding the way around the city
and maybe learning the new language because you don't know if the stranger is already mad at you if you don't understand what is he talking about.
Most Greeks lived near the Eastern Mediterranean sea and in southern Europe.
