Answer:
C: The stimulation of agriculture by technological innovation
Explanation:
The popularity of Champa rice can be marked to centuries ago when there were not more types of rice cultivated. Champa rice was introduced to the southern part of China from Southern Vietnam. One of the advantages of this crop was that it facilitated double cropping as it matured in less duration. The adoption of machinery and equipment helped to grow the crop in an enormous quantity. Improvement in the irrigation facilities also helped the crops t flourish and grow in a large amount.
Answer:
The Aztec ruled over a large Empire that included most of Central and Southern Mexico. They had subjugated other peoples like the neighboring Tlaxcaltecas, who were in fact crucial for the Spanish Conquest.
The Aztec were often very ruthless against their subjects. They extracted onerous economic tribute, and also practiced human sacrifices, often killing people from the subjugated tribes.
The turning point of the American Revolution occurred at the battle of "Saratoga," due mostly to the fact that the the colonial victory of Britain convinced the French to officially support the colonial army against the British.
Since moist water come from warm air, I would say the air would be going down.
