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Para-jumbles 11 / 100

a. This invisible component is estimated to constitute approximately 27% of the universe's total mass-energy density, posing a significant challenge to our understanding of cosmic composition.
b. The existence of dark matter, an enigmatic substance that does not interact with light or other forms of electromagnetic radiation, has been inferred primarily from its gravitational effects on visible matter.
c. Consequently, numerous experiments worldwide are dedicated to directly detecting dark matter particles, often involving highly sensitive underground detectors shielded from cosmic rays.
d. Observational evidence supporting its presence includes the anomalous rotation curves of galaxies, where stars at the outskirts orbit much faster than expected based on the visible mass alone.

These sentences, when properly sequenced, form a coherent paragraph. Which of the options best outline their correct order?

1. b, d, a, c

2. d, b, a, c

3. b, a, d, c

4. a, d, b, c

Correct Answer: 1 (b, d, a, c)
To solve "Sentence Rearrangement" or "Para-jumble" tasks, look for the logical flow of ideas:
Step 1 (Introduction): Sentence (b) serves as the ideal opening statement. It introduces the main topic, dark matter, defines it, and explains how its existence is inferred, setting the stage for the subsequent discussion.
Step 2 (Elaboration): Sentence (d) logically follows (b) by providing the primary observational evidence for dark matter's presence, specifically detailing the "gravitational effects" mentioned in (b) through galaxy rotation curves.
Step 3 (Secondary Factor): Sentence (a) builds on the previous two by quantifying the significance of this invisible component ("This invisible component" refers to dark matter previously discussed) and highlighting the challenge it poses, expanding on its cosmic implications.
Step 4 (Conclusion/Result): Sentence (c) concludes the paragraph by introducing the current scientific efforts to address the challenge posed by dark matter, using the transition word "Consequently" to indicate a direct result of the preceding facts and challenges.

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