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Difficulty: MediumTranslating Literal Statements to Paraphrases

In the sunlit upper layers of the ocean, larval fish rely on a complex auditory landscape to navigate toward coral reefs suitable for settlement. Recent hydroacoustic monitoring reveals that these microscopic organisms do not merely drift passively; rather, they actively orient themselves toward the crackling sounds produced by snapping shrimp and the low-frequency grunts of resident fish. This acoustic guidance is critical because physical cues, such as chemical gradients or light patterns, are often disrupted by turbulent surface currents. Consequently, in areas where anthropogenic noise pollution disrupts this delicate marine biophony, the recruitment success of reef-dwelling species declines significantly, as larvae are unable to locate their target habitats.

According to the passage, larval fish must rely on acoustic guidance primarily because:

  1. turbulent currents make alternative navigation cues like light and chemicals unreliable.Answer
  2. B
    chemical gradients and light patterns are only present in the deeper layers of the ocean.
  3. C
    snapping shrimp and resident fish actively disrupt physical cues with their sounds.
  4. D
    larval fish lack the sensory organs needed to detect visual and chemical indicators.

Answer

Larval fish rely on acoustic cues because water turbulence interferes with alternative navigation aids like light and chemistry.
The correct answer accurately restates the passage's explanation that turbulent currents disrupt chemical gradients and light patterns, which are the main alternative physical cues for navigation.

Step-by-Step Solution

1
Locate the portion of the passage that explains why acoustic guidance is necessary.
Identified the sentence: 'This acoustic guidance is critical because physical cues, such as chemical gradients or light patterns, are often disrupted by turbulent surface currents.'
This sentence directly provides the cause-and-effect relationship explaining the necessity of acoustic navigation.
2
Translate the identified literal statement into a paraphrase and compare it with the options.
The statement explains that turbulence (turbulent surface currents) disrupts (makes unreliable) physical cues (chemical gradients/light patterns). The option stating that turbulent currents make alternative navigation cues like light and chemicals unreliable is a direct paraphrase.
Paraphrasing requires preserving the exact logical relationship of the original statement while using different wording.

Key Concept

Translating Literal Statements to Paraphrases
Estimated Time:1m 30s
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Translating Literal Statements to Paraphrases

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