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.

• A. E, D, B, C, A
• B. B, A, E, C, D
• C. C, E, B, A, D
• D. D, E, C, B, A
• E. A, B, E, C, D

Hint:

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.

Answer 1

The Correct Option is B

Step 1: Determine the logical progression.
- The argument commences with a broad assertion regarding habitability → B (“The final ingredient for a habitable world is a source of energy for life to exploit”). - It then addresses Europa, dismissing solar energy → A. - This introduces a complication → E (“That is a bit of a problem”). - Subsequently, it uses Earth as an illustration, where ecosystems flourish independent of direct sunlight → C. - Lastly, it elucidates the survival mechanisms of these deep-ocean organisms → D.
Step 2: Confirm the logical consistency.
The sequence B, A, E, C, D constructs a coherent, flowing, scientific argument.
Final Answer: \[\boxed{\text{B}}\]