Concept:Logical sequencing of sentences to form a coherent paragraph.
Explanation:S1 starts with "Hope springs eternally in the heart of man."
S6 concludes "This is the central idea of the poem."
Q says: "Love, friendship, and youth perish." This contrasts with hope and follows S1 naturally.
P says: "But hope is everlasting." This directly counterpoints Q's perishable things.
R says: "It is nursed by the glorious elements of nature." "It" refers to hope from P.
S says: "Man derives hope from nature in his gallant struggle after some noble ideal." This elaborates on R and leads into S6.
Thus the correct sequence is Q → P → R → S.
Answer:Option A: Q P R S