Answer:
Social harmony is the living together of people of a particular social group with love, care, respect and brotherhood, regardless of their religion, region, caste, gender, colour etc.
A) is not the answer because we use nearby resources as an important factor in the site and growth of cities.
B) is not the answer because we need to be able to go and trade with other cities, or countries.
C) is correct because people don't use the prevailing wind direction as an important factor in the site and growth of cities.
D) is not the answer because we need to be able to defend our city or country.
So the correct answer is C)
Hope I helped.
I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.
The answer is b. a common currency
hope this helps ! :D
