Answer :
Final answer:
The migration rate is the rate that measures population movement to a country, alongside birth and death rates, crucial for understanding population dynamics.
Explanation:
The correct rate that measures how many people are moving to a country is the migration rate (D). Migration involves the movement of individuals into or out of a population and is a key factor in population change.
Demographers study migration along with birth and death rates to understand population dynamics. By examining the migration rate, researchers can track the flow of people contributing to population growth or decline.
Understanding migration rates is crucial for nations to plan for social, economic, and political changes driven by shifts in population sizes and demographics.
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