Answer:
This made double-cropping possible in some areas, and in some places, even triple-cropping became possible ... the hardiness and productivity of various varieties of rice were and are in large part responsible for the density of population in South, Southeast, and East Asia.
Answer:
The Tang rulers changed China were the enlargement of China, extension of roads and canals, helping to tie the empire together. Social changes that occurred in China during the Tang and Song Dynasty were a new upper class.
There have been many wars, you need to specify which one you mean
Answer:
They do not experience stress is the correct answer.
Explanation:
