In what part of china did the population increase the most?
the northeast
the northwest
the southeast
the southwest

Southeast

Explanation:

Industrialization, social stability, productive development and the improvement of medical and hygienic conditions have made population growth possible in China. These elements were most significant in the Southeast region of the country. Because people in this region had better living conditions, population growth was more prominent in the southeast than in other regions of the country.

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answer; /// i believe that the correct answer is (d)the huang he river valley;