B. Sails
The Egyptians were among the first to use sails on their ships to improve transportation.
I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
According to Jane Jacobs, the circumstance that would be most safe for city dwellers will be a busy street with many shoppers, workers, and sightseers walking around.
According to Jane Jacobs, a city that is busy is considered to be the safest for city dwellers.
When the city is busy, people are present in shops, roads, and other places. In this case, there will be less chance for misfortune to happen because an attacker will fear the people that are present around. Hence, when the city is busy and people are either going to work, are present in shops, are working etc, there will be fewer chances of an attack and the city will be safe during this time.
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The answer is Treaty of Verisillies I took the test and got an A.
