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Which of the following best describes the classification of experimental substance use?
Homo Erectus
"Upright human." A species within the genus Homo first appearing just after 2 million years ago in Africa and ultimately spreading throughout the Old World.
Oligocene Era
A geologic epoch of the Paleogene Period, occurring from about 34 to 23 million years ago, during which mammals and birds evolved considerably.
Continental Drift
In the theory of plate tectonics, the movement of continents embedded in underlying plates on the earth's surface in relation to one another over the history of life on earth.
Climate Change
Significant and long-term changes in the Earth's climate, including global warming, largely attributed to human activities.
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