Concept:This is a sentence rearrangement task where the goal is to logically sequence the jumbled parts (P, Q, R, S) to form a coherent and grammatically correct sentence.
Explanation:Statement S introduces the main subject—"genetic modification (GM) is the science".
Statement P follows immediately by explaining what that science does: "by which the genetic material of a plant is altered".
Statement R continues the thought by stating the purpose of that alteration: "perhaps to make it more resistant to".
Statement Q completes the sentence by providing the specific benefits: "pests and enhance its nutritional value".
Thus, the correct sequence is S → P → R → Q.
Answer:The correct sequence is SPRQ, which corresponds to option B.