populations grown and change depending on the amount of people that they gain and the amount of people that is lost. this process of change in population due to birth and deaths are known as a natural change. the factors that are responsible for such a natural change are - birth death , death rate and migration. distribution of organims is usually based on how individuals are distributed in a population at a particular period. they can either be equally spaced , dispersed randomly or clustered in groups.
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