1 Answers
Option 1 : QPRS
The passage tells us about the formation of dust storms.
The sentence P would be followed by R. Sentence R says 'The air over the ground becomes hot', which is a further elaboration of the 'intense heating of the ground' mentioned in sentence P.
Sentence R is logically followed by sentence S. Sentence S talks about 'the storm' mentioned in sentence R.
Leaving only sentence Q to be arranged. Putting sentence Q as the last sentence of the arrangement doesn't make any sense and therefore sentence Q becomes the first sentence of the arrangement. It also introduces the subject of the passage and therefore becomes the introductory sentence.
Therefore, the correct order would be QPRS.