Question:

Read the following statement carefully.
A. Whatever that might be on Europa—far from the Sun, and beneath kilometres of ice—it will not be sunlight.
B. The final ingredient for a habitable world is a source of energy for life to exploit.
C. On Earth almost every living thing ultimately depends on photosynthesis for its energy, including the rich ecosystems in the ocean depths, discovered in the 1980s and which helped the idea of life on Europa gain a foothold.
D. Their inhabitants do not benefit from sunlight directly, but their metabolisms are powered by chemicals created in the photosynthesising, oxygen-rich surface oceans far above.
E. That is a bit of a problem.
Fill in the blanks meaningfully, in the above statement, from the following options.

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For paragraph arrangement questions, look for: 1. General-to-specific order. 2. Problem-introduction-solution flow. 3. Scientific explanations usually move from premise → problem → evidence → example.
Updated On: Dec 17, 2025
  • E, D, B, C, A
  • B, A, E, C, D
  • C, E, B, A, D
  • D, E, C, B, A
  • A, B, E, C, D
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The Correct Option is B

Approach Solution - 1

The given question requires arranging a set of sentences logically and meaningfully. Let's examine each option and evaluate which option provides a coherent narrative.

  1. Understanding the Initial Sentence:
    • The sentence provided does not have a specified order and requires us to deduce a logical sequence that maintains the narrative or argument.
  2. Logical Analysis of Each Option:
    • Option 1: A, B, E, C, D
      • The sequence does not provide a clear narrative, as it jumps between ideas without proper connection, e.g., jumps to point E without introducing any preceding problem.
    • Option 2: B, A, E, C, D
      • Sentence B introduces the need for an energy source, logically followed by sentence A, which contrasts this need on Europa.
      • Sentence E follows as a natural statement of concern, then C provides an explanation, making it relevant, and D follows logically as part of this explanation.
    • Option 3: C, E, B, A, D
      • Begins with a detailed explanation, followed by a problem statement without the logical flow of requirement and issue; lacks coherence as a starting point.
    • Option 4: D, E, C, B, A
      • The sequence starts with a detail (D) that depends on the context given in C, disrupting the logical flow necessary at the beginning.
    • Option 5: E, D, B, C, A
      • Starting with a problem statement (E) without first establishing a context or requirement results in a lack of clarity and logical progression.
  3. Conclusion:
    • Upon evaluating all the options, Option 2 (B, A, E, C, D) presents the most logical flow, starting with a broader notion of what's necessary (B), contrasting with Europa's condition (A), identifying a problem (E), and then explaining (C) and detailing (D).

Therefore, the correct sequence is:

B, A, E, C, D

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Approach Solution -2

Step 1: Identify the logical flow.
- The argument begins with a general statement about habitability → B (“The final ingredient for a habitable world is a source of energy for life to exploit”). - Next, it refers to Europa and rules out sunlight → A. - This leads to a concern → E (“That is a bit of a problem”). - Then it provides Earth’s example, where ecosystems thrive even without direct sunlight → C. - Finally, it explains how these deep-ocean organisms survive → D.
Step 2: Verify coherence.
Sequence B, A, E, C, D forms a logical, smooth, scientific argument.
Final Answer: \[ \boxed{\text{B}} \]
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