Answer:
Birth rate: the number of individual organisms born into a population in a given year
Emigration: the movement of individuals out of a population
Death rate: the number of individual organisms that die in a population in a given year
Immigration: the movement of individuals into a population
Matching these definitions to their appropriate terms
Individual organisms enter a population either by immigration or by birth while individual organisms leave a population by either emigration or death. While the general term used to describe the movement of individuals in and out of a population is migration.
Death rate is number of deaths that occurs in a particular population over a period ( usually 1 year ) while Birth rate is the number of births that occurs in a population over a period as well.
Hence we can conclude that the terms matching each description as mentioned in the question are , Birth Rate, Emigration, Death rate and immigration.
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