PrepTest 151, Section 1, Question 25
According to the generally accepted theory of plate(459 more words not shown)
Based on the information in(15 more words not shown)
- ADepending on the(16 more words not shown)
- BThe lower the(20 more words not shown)
- CAny region where(18 more words not shown)
- DEven at low(15 more words not shown)
- EEven in such(19 more words not shown)
Reading the passage
The final warning concerns regions with low levels of subduction. Why might they still face significant earthquake risk? The explanation has shifted our attention from how much subduction occurs to what kind occurs. A shallow angle can leave the plates pressed together and generating friction even if the region doesn't have much subduction overall.
What we’re looking for
A useful next sentence would make that connection explicit. We need a reason that low subduction doesn't establish safety, grounded in the mechanism we've just learned.
Working the answers
- A
Speed matters within the earlier account, but merely saying that velocity could increase doesn't explain this warning. We still need to know how the collision would affect descent, contact, and friction. A supplies no connection to the risk in a low-subduction region.
- B
This adds a relationship we were never given: less subduction makes a shallow angle more likely. The argument links angle to friction and earthquakes. It doesn't say the overall amount of subduction determines the probability of that angle.
- C
More subduction does not, by itself, establish more seismic activity. The quiet zones demonstrate why the kind of subduction matters. C returns to the amount alone and assumes the earthquake increase that needs support.
- D
“Inevitably” cannot fit an explanation built around subduction with little or no earthquake activity. Even intense subduction can be relatively quiet.
- ECorrect
This directly explains the warning. Even in the low-subduction region just described, a shallow descent can create substantial earthquake-producing friction. We don't need an increase in the amount of subduction to understand that risk; the existing subduction's angle can matter.
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