Concept:The correct sequence logically connects the opening statement about agriculture with the closing duty, by first introducing farmers, then their role, then challenges, then a solution.
Explanation:Start with the given statement: "Agriculture is the backbone of our economy."
Next, part P introduces farmers' hard work despite weather – natural first detail.
Then Q explains what they do: grow crops that feed the nation.
After that, R introduces a contrast: "Yet, they face several challenges."
Finally, S suggests a solution: "Modern technology can support better yield."
This order flows smoothly: effort → contribution → problem → remedy → conclusion.
Other options break this logical flow. For example, placing R before Q skips explaining the farmers' contribution, making the contrast less meaningful.
Answer:The correct order is PQRS, which matches option A.