Rearrange the following sentences to form a coherent paragraph: 1. Such stories frequently examine the moral and societal impact of technological progress, from AI to genetic modification. 2. Science fiction is a form of speculative writing that commonly presents imaginative ideas related to future science and technology. 3. As a result, it becomes a strong medium for social critique and for forecasting upcoming problems and dilemmas. 4. Though it entertains readers, the genre offers more than simple escapism.

The correct option is (a). The correct order must introduce the topic, develop the idea, and then conclude logically. Sentence 2 should come first because it defines what science fiction is and introduces the subject clearly. Sentence 4 follows naturally because it adds a contrast: even though the genre entertains, it offers more than escapism. This expands the definition into a purpose. Sentence 1 then provides specific details about what such stories examine (moral and societal impact), supporting the claim made in sentence Sentence 3 is the conclusion, beginning with As a result, which clearly depends on the ideas given earlier and sums up the outcome (social critique and forecasting dilemmas). Grammar and cohesion clue: Connectors like Though (sentence 4) and As a result (sentence 3) guide the logical flow: definition → contrast/purpose → examples → conclusion. So the correct answer is (a)