Final answer:
The major outcome of Mao Zedong's Great Leap Forward policies was mass starvation in China, resulting from a decline in agricultural production.
Step-by-step explanation:
The major outcome of Mao Zedong's Great Leap Forward policies was that his policies resulted in mass starvation in China. The Great Leap Forward was a social and economic campaign aimed at rapidly transforming China from an agrarian economy to a socialist society through rapid industrialization and collectivization. However, the implementation of these policies led to a decline in agricultural production, which resulted in widespread famine and the death of an estimated 20 to 40 million people.