I think it is known as the Middle Ages.
Not too sure
Answer:
I think it was all of them above?
Explanation:
Answer:
However, if we had to point to a particular moment, we might point towards 1920, as this was the year in which more Americans were living in cities than in the countryside for the first time. One of the innovations that had the greatest influence on this shift was the introduction of the assembly line.
Explanation:
Answer:
This is the best I could do to help :)
Explanation:
Look up what is Puerto Rico's economy and click the brittanica link. Copy the link and paste it to wherever your work is...Hope this helps :) (I'll try to link it in the comments)