The world’s population is concentrated in certain countries like China most likely because of
1. there being endemic diseases in the country.
2. the lack of availability or lack of use of contraceptives.
3. the emigration of people from more populated countries.
4. the country’s land mass, which is much larger.
The world's population is concentrated in certain countries like China due to a combination of various factors. These factors include:
1. Historical and cultural factors: China has a rich history and culture, which has contributed to the growth and concentration of its population over time.
2. Economic development: As one of the world's largest economies, China has experienced rapid economic growth and development, which has attracted people from rural areas to urban centers, leading to population concentration in certain regions.
3. Government policies: China's government has implemented various policies, such as the one-child policy (recently changed to a two-child policy) to control population growth. While controversial, these policies have contributed to population concentration in certain areas.
4. Migration: China has a large internal migration flow, with people moving from rural areas to more developed regions, often in search of better job opportunities and living standards. This migration contributes to population concentration in specific areas.
It is important to note that the reasons for population concentration can vary among countries, and these factors may not necessarily apply to all countries with concentrated populations.