The force that would be most likely to connect two different regions where there are people changing residence locations is migration.
Here’s a brief distinction between the options:
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Nutrient pollution: This refers to the contamination of water bodies with excess nutrients, leading to problems like algal blooms. It is primarily an environmental issue and does not directly relate to the movement of people.
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Globalization: This is the process of increased interconnectedness and interdependence among countries, which can influence various aspects of life, including economics and culture. While it can affect migration patterns, it is not a direct action of moving individuals from one place to another.
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Migration: This is the movement of people from one place to another, often for purposes such as employment, education, or family reunification. It is the most direct force connecting different regions through the relocation of individuals.
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Runoff: This refers to the movement of water (usually rain or melted snow) across the land surface that can lead to erosion or transport pollutants. Like nutrient pollution, it pertains more to environmental factors rather than the movement of people.
Therefore, migration is the force that connects regions through the movement of individuals changing their residence locations.