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The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.
P. As the Plains was settled and grassland converted for crops and grazing, fires were seen as a threat and extinguished.
Q. Historically, fires set by lightning burned naturally at regular intervals across the Great Plains.
R. Native Americans, who saw the benefits, periodically burned the prairie to improve grazing conditions for buffalo.
S. In the last 50 years, as woody plants began increasing and transforming the grassland into a shrub ecosystem, fire has returned to the Plains in the form of controlled burns.
- ASRQP
- BPSQR
- CRSQP
- DQRPS
Correct answer: D