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Purpose of an Example
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SAT Prep
RW-119 Purpose of an Example
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Borders can be ecological as well as political. In one region, a mountain ridge separated two plant communities more sharply than the nearby national boundary did. Why does the author include the mountain-ridge example?
A
To contrast a natural boundary with a political boundary in explaining ecological difference
B
To show that the same plants grow everywhere in the region, in light of the details supplied in the text.
C
To argue that national boundaries have no practical effects, according to the passage's overall discussion.
D
To describe the process by which mountains form, as the evidence in the passage most directly indicates.
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