| A | B |
|---|
| demography | the study of the characteristics of populations, especially human population |
| age structure | the classification of members of a population into groups according to age or the distribution of members of a population in terms of age groups |
| survivorship | the percentage of newborn individuals in a population that can be expected to survive to a given age |
| fertility rate | the number of births per 1,000 women of childbearing age |
| migration | any movement of individuals or populations from one location to another; specifically, a periodic group movement that is characteristic of a given population or species |
| life expectancy | the average length of time that an individual is expected to live |
| demographic transition | the general pattern of demographic change from high birth and death rates to low birth and death rates, as observed in the history of mroe-developed countries |
| infrastructure | the basic facilities of a country or region, such as roads, bridges, and sewers |
| arable land | farmland that can be used to grow crops |
| urbanization | an increase in the ratio or density fo people living in urban areas rather than in rural areas |
| least developed countries | countries that have been identified by the United Nations as showing the fewest signs of development in terms of income, human resources, and economic diversification |
