Concept:The passage sequencing is based on logical connections between sentences, especially linking words and continuity of ideas.
Explanation:S1 introduces biology as the study of life.
R talks about the growth of biology over the last 1000 years, which logically follows S1.
S uses “this growth”, directly referring to R, so R‑S is a fixed pair.
P discusses later focus on physiology and anatomy, which naturally follows the classification mentioned in S.
Q introduces Darwin’s ideas of evolution by natural selection, leading to the theoretical framework in S6.
Thus the correct order is R → S → P → Q.
Option A (RSPQ) matches this sequence.
Answer:Option A (RSPQ).