Which of the following is consider as natural cause of population change? I. Births II. Migrations
Only I
The question separates the natural causes of population change from the other causes, listing Births (I) and Migrations (II).
The size of a population changes through three components: births, deaths and migration.
Births and deaths are biological events that happen naturally within a population, so they are called the natural causes of change, and their difference is the natural increase or growth of the population.
Migration, however, is the movement of people into or out of an area; it is a social, economic or induced factor rather than a biological one, so it is not counted as a natural cause.
Of the two statements given, only Births (I) qualifies as a natural cause, since deaths - the other natural component - is not offered as an option and migration is excluded.
Hence, the correct answer is Only I.
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