I’m not entirely sure what is being asked here, but the Tigris and Euphrates rivers is the only place in Egypt (besides the nile delta) with non-arid ground. That’s why most people live around there:
Natural, it is not man made.
They did this because the goths needed somewhere to stay the Roman Empire offered to help out
Answer: There is no delta at the mouth of the Hudson River because it has a short history of erosion, which means it does not have a delta as there is no sediment to be deposited.
Answer:
The volcano continued to spit ash through the end of April, forming two large craters which eventually merged into one.
