Which agent of evolution tends to reduce genetic variation between populations and increase genetic variation within each population?

Name: Which agent of evolution tends to reduce genetic variation between populations and increase genetic variation within each population?
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Question

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Migration, also known as gene flow, tends to bring new alleles into a population and can reduce genetic differences between populations. At the same time, it can increase genetic variation within each population.

Which Agent of Evolution Tends to Reduce Genetic Variation Between