Examlex
Which one of the following statements is always true of the substitution effect?
Ethnicities
Social groups that share a common and distinctive culture, religion, language, or the like.
Blue Marble
A famous photograph of the Earth taken in 1972 by the Apollo 17 crew, symbolizing Earth's fragility and unity.
Circumnavigation
The action or process of sailing or otherwise traveling all the way around the entire planet, continent, or an island.
Urbanization
The process by which towns and cities are formed and become larger as more people begin living and working in central areas.
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