Concept:Paragraph sequencing requires logical connection between sentences, starting from the given first sentence S1 and ending with S6.
Explanation:S1 introduces "farming as the main production activity."
The next sentence should logically extend this idea. Only Q mentions "important changes in the way farming is practiced," directly connecting to S1.
Thus, Q is the first after S1. So the sequence begins with Q.
Only option A (QPSR) starts with Q.
Now verify the full sequence: Q → Over the years, many important changes in farming.
P → These changes have allowed farmers to produce more crops from the same land.
S → This is an important achievement because land is fixed and scarce.
R → However, raising production has put pressure on land and other natural resources.
Finally, S6 concludes that new farming needs less land but more capital.
The flow is logical: changes (Q), their benefit (P), importance (S), trade-off (R), and modern requirement (S6).
Hence, the correct sequence is QPSR.
Answer:Option A: QPSR