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Difficulty: MediumContrast and Reversal Clues

While early marine biologists characterized deep-sea abyssal ecosystems as biological deserts devoid of dynamic interaction, recent oceanographic surveys reveal that these environments are paradoxically ________, harboring dense clusters of specialized organisms that thrive on chemosynthetic energy.

Which of the following words best completes the sentence above?

  1. teemingAnswer
  2. B
    desolate
  3. C
    dormant
  4. D
    barren
  5. E
    stagnant

Answer

teeming
The word 'teeming' (meaning abundantly filled or swarming) establishes the necessary contrast with 'biological deserts' signaled by the pivot word 'paradoxically'. This fit is further confirmed by the phrase describing dense clusters of thriving organisms.

Step-by-Step Solution

1
Identify structural transition signals and context clues in the passage.
The dependent clause describes early views of abyssal ecosystems as 'biological deserts devoid of dynamic interaction'. The word 'paradoxically' serves as a contrast pivot signaling a reversal of this concept.
Contrast pivot words require the blank to take on the opposite semantic valence of the initial description.
2
Determine the required meaning for the blank based on elaboration clues.
The final clause specifies that these environments harbor 'dense clusters of specialized organisms that thrive', indicating an environment rich with life.
The word in the blank must denote abundance or high biological activity to contrast with 'deserts'.
3
Evaluate choices to select the word that satisfies the contrast.
'Teeming' means abundantly filled or overflowing with life, making it the precise fit.
Choices like 'desolate', 'dormant', 'barren', and 'stagnant' ignore the reversal signal and repeat the premise tone.

Key Concept

Identifying semantic reversal through contrast pivot words like 'paradoxically'.
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Topics

Contrast and Reversal Clues

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