Economic activities nations also have similar
Answer:
I believe the answer is city-state structure.
I hope I helped, please correct me if I'm wrong!
Answer:
The best description would be that they were regularly attacked by the arabs eventually leading to the fall of the Byzantines and there empire and lead to the citys rename to istanbul which is still there in modern day middle east. It is The empire was regularly attacked by Arab Muslims. I hope this helped.
Explanation: