Answer:
This is easily the most argued question about the fall of Rome. The Roman Empire lasted over a thousand years and represented a sophisticated and adaptive civilization. Some historians maintain that it was the split into an eastern and western empire governed by separate emperors caused Rome to fall.
Most classicists believe that a combination of factors including Christianity, decadence, the metal lead in the water supply, monetary trouble, and military problems caused the Fall of Rome.3 Imperial incompetence and chance could be added to the list. And still, others question the assumption behind the question and maintain that the Roman empire didn't fall so much as adapt to changing circumstances.
Answer:
Due to the adverse conditions of poverty and unemployment in the rural areas, people migrate to urban areas. In urban areas they find increased employment opportunities and better living conditions.
Explanation:
answer above
Volcanic eruptions can destroy building that store resources, burn trees, kill animals and make land not suitable for farming etc
Nomadic travelers in central and east Asia were able to survive the harsh conditions of the tundras by adapting to the harsh environment that is engulfing the area or region. Also they keep moving with their hut or shelter and also may uses oxen for transportation and carrying logistics.
Hope this helps :))