A proportional symbol map uses symbols of varying sizes to represent what?

A proportional symbol map employs symbols—typically circles or shapes—of varying sizes to convey the magnitude of a particular attribute. In this case, the correct answer focuses on representing the density of that attribute within a specific geographic area.

For example, if the attribute is population, larger circles on the map would indicate areas with a higher population density, while smaller circles would represent areas with lower population density. This visual differentiation allows viewers to quickly understand the relative density across different locations, leading to insights about spatial relationships and patterns.

In contrast, other types of maps may focus on different aspects. While population distribution could potentially be represented in this manner, it is the density aspect that directly correlates to the varying sizes of the symbols. Land usage types and climate data are better suited for thematic maps that categorize areas by color or shading rather than size differences.