Shanghai is one of the most populated cities in Asia, and New York is one of the most densely populated cities in North America. The population of Shanghai is homogenous , but the population of New York is heterogeneous. The people in Shanghai speak Chinese; the people in New York speak English instead. The cost of living in Shanghai is generally low in comparison with that in New York. While the people in Shanghai take buses or ride bikes to go to work, the people in New York drive cars or take subways to get to work. The people in Shanghai use fans to keep cool, whereas the people in New York use air-conditioning. Method used _______________