The answer is: Man made infrastructure.
This is more relevant in a 'political' map which shows the political boundaries and representations of countries.
More precisely,
Black color shows railway lines, roads, bridges, borders, and names of places
Red color indicates Major Highways, urban areas, airports, military installations etc.
These lines/markings/colors might not be seen physical maps, which feature the geography of the land.
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Answer:
The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion; and on Application of the Legislature, or of the Executive (when the Legislature cannot be convened) against domestic Violence.
a republic
Tropical latin americas proximity to temperate and affluent north america has helped make tourism on f the regions most important industries.Generating critical foreign exchang; only oil exports are more valuable.
