Answer:
The answer for first blank is Population.
The answer for second blank is 1979.
Explanation: During the Mao Zedong's regime , urban income and life expectancy increased. As a result,there was an increase in China's population.
To overcome this problem, China established the one child policy in 1979.
*One child policy= One child policy was adopted by China in 1979 in order to control the population blast.This campaign was one of the most extreme rule of population control. There was a rule huge fine and punishment for the family who breaks it.
On the other hand the families who used to obey this rule, they were rewarded their obedience.
