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birth death migration/emigration
A major burden to the growth of China's economy was cause by the high population growth. An increase in the population has resulted into limited resources among the residents.
Emigration.
instability of government and political environment as well as civil war
Birth rate: The number of births per 1,000 people in a given population affects its growth rate. Death rate: The number of deaths per 1,000 people can impact the population size and structure. Immigration: The movement of people into a population can increase its size and diversity. Emigration: The movement of people out of a population can decrease its size and potentially impact its workforce and demographics.
if the death rate decrease and the immigration and emigration rate increase community can reach its carrying capacity.
When the population's resources become less available.
animals like u
New food crops
Africa
when a predator developes a population growth increase, its prey will be over-hunted and could cause premature extinction
Migration can increase population size by speading the animals (or people) over a wider area where there may be more resources. Migration (compression) into a single habitable area will increase the population density, but could cause either a numerical increase (more breeding) or a decrease (from limited resources).