Although there were several geographic features that allowed the Roman Empire to spread easily, the most important was the Mediterranean Sea, since this allowed for unparalleled access to the entire coastline of southern Europe and Northern Africa.
Economic activity and its correct economic term.
receiving $5 for washing your father’s car - incentive
paying part of your income to the government - taxation
a person in China purchasing an American mobile phone - injection in the US economy
a person in the United States purchasing a car made in Germany - leakage in the US economy
Receiving $5 is an incentive because it is something that encourages one to do something.
Taxation is the money or percentage of your income paid to the government.
Injection is allowing entry while leakage is allowing flow or escape.
They felt that americans were better so they expanded under the influence of god