Final answer:
Cartograms are maps that use a thematic variable to represent data and show relative population sizes of countries.
Explanation:
Cartograms are maps that substitute a thematic variable, such as population, for land area or distance. They are used to show relative population sizes of countries by adjusting the size of each country based on its population. An example is a population cartogram where country sizes reflect their populations.
Learn more about Cartograms and Population Representation here:
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