Concept:The logical flow of a paragraph explaining why solar energy is gaining popularity — starting with its abundance, then sustainability, comparison with fossil fuels, and finally reduced dependency on non-renewable sources.
Explanation:Sentence 1 introduces the topic. Part P directly follows because it states the first benefit: “It is available in abundance.”
Next, Q connects logically: “This makes it a sustainable option” — referring back to abundance.
Then R adds a contrast: “Unlike fossil fuels, it doesn't emit harmful gases.”
Finally, S concludes with another advantage: “Also, it reduces dependency on non-renewable sources.”
This sequence (PQRS) leads smoothly to sentence 6 about government investments.
Other orders break the cause‑effect or comparison logic.
Answer:Option D. PQRS