system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are India and China so densely populated?
gpt
Both areas have stable climates, good soil, plenty of water and of course, rice. Per square mile rice has a very high yield and can be grown in many places, as long as you have enough water for it. Rice is also very labour intensive, which would incentivize rice farmers to have very large families, which they also had no trouble feeding thanks to their amazing rice.