A ruler-like symbol used to measure distance on a map is a scale. It shows the ratio of the distance on the map to the actual distance.
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A.economic Geography is the answer
It can't be B or C.. or D so try A. Plant succession <span>is the process of change in the species structure of an </span>ecological<span> community over time. The time scale can be decades (for example, after a wildfire), or even millions of years after a mass extinction.</span>
