Answer: Advancements in household technology
Increased life expectancy for women
Development of the service industry
Well there could be problems with food, and if there is a sickness, or a desater, like flooding around you could not move on. Also the population can reduce food, and water.
Answer:
Tokyo, Japan
Explanation:
The world's largest urban area, Tokyo (37.4 million), has almost the same population as the entire country of Canada (37.6 million).