Los Angeles, San Diego, and neighboring cities mutually support each other in their urban development and expansion. These cities have grown together into one continuous urban community, and together they are an example of a __________.

A megalopolis is a large, continuous urban region formed as neighboring cities grow and expand toward one another. The question describes Los Angeles, San Diego, and nearby cities as connected into one urban community, so the best answer is “megalopolis.” A choropleth is a type of map, not an urban region.

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