Concept:This is a paragraph jumble task where we connect S1 and S6 logically using the given sentences.
Explanation:Sentence R ("Sometimes we work continuously.") directly follows S1, which states that leisure is as important as work.
Next, sentence P ("And we feel very tired.") naturally continues R, as it describes the result of working continuously.
Then, sentence Q ("Unless we have some break, we cannot carry on and our health may suffer.") explains why we need a break after feeling tired.
Finally, sentence S ("After a little relaxation, we can work more energetically and efficiently.") concludes the reasoning, leading to S6's advice to use leisure properly.
Thus the correct order is R, P, Q, S.
Answer:D. RPQS