Its temperature and clouds because according to the temperature the clouds will react
I believe it is c they were ruled by emperors
Europe and North America used different tactics such as slavery and trade to industrialize and blossom into more powerful empires. The Chinese had many factions and rifts within themselves thus not thinking and seeing themselves as one strong country while the Europeans and Americans weren't divided and thought of themselves as one people. This also led to the growth of development and human enhancement
Hope it helps
Answer:
releasing emissions from vehicles and industry
