These people became wealthy mostly because of efficient trade between countries. Trading was an important factor back then, and your key word is COASTAL, meaning they are by a sea (aka trading routes). So the answer is trading between countries.
Answer:
The Roaring Twenties was a decade of economic growth and widespread prosperity, driven by recovery from wartime devastation and deferred spending, a boom in construction, and the rapid growth of consumer goods such as automobiles and electricity in North America and Europe and a few other developed countries.
D he encouraged Greece to create a strong navy i hope this helps!
It was polio because of the ppl in 1948
OK so basically its purpose was to give financial aid to European countries so that they could rebuild after the devastation of world war II
