What exacerbated the great leap forward famine in china in the late 1950s?

an increased proportion of wealthy citizens

civil war

a shift from individual to collective farms

quota systems

The correct answer is - a shift from individual to collective farms.

Even though it may seem that the collectives are advantageous in the agriculture, we have to take into consideration that is was a socialist system, so the collectives were operating in different manner. When people had their own farms, they were producing enough food for themselves, and maybe something for sale/trade, but in accordance to their needs and circumstances, but when the collective farms were introduced, it all changed. The people were no more able to produce what they want and need, but the government officials were doing that, by creating annual planing about what should be farmed, in which way, and in what amount, and that caused huge problems with lack of food, because the agriculture is very unpredictable, and on top of that, it is practically impossible to create an accurate plan for hundreds of million of people.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.