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Difficulty: MediumDeciphering Meaning via Structural Clues and Contrast/Continuation Signals

Based on the structural clues and contrast signals in the passage below, enter a word that best completes the sentence.

Answer:While early behavioral ecologists hypothesized that avian foraging patterns were governed strictly by instinctual routines, subsequent field observations revealed that crows demonstrate remarkably 【flexible】 behavior when presented with novel mechanical puzzles. Far from adhering to inflexible routines, these birds dynamically modify their problem-solving techniques in response to unexpected obstacles, proving that their cognitive strategies are far more malleable than previously assumed.

Answer

The word completing the blank must mean 'flexible', 'adaptive', 'malleable', or 'plastic'.
The concessive conjunction 'While' establishes a shift away from the idea of 'inflexible' and 'instinctual' routines. This contrast is elaborated by the subsequent phrases 'dynamically modify' and 'far more malleable,' which mandate a word meaning adaptable or flexible to complete the passage coherently.

Step-by-Step Solution

1
Identify key contrast markers in the initial clause.
The opening transition 'While' creates a direct contrast between historical hypotheses ('governed strictly by instinctual routines') and modern field observations.
Contrast signals indicate that the missing word must express a quality opposite to rigid or instinctual routines.
2
Examine structural continuation and elaboration signals in the second sentence.
The clause 'Far from adhering to inflexible routines' and the descriptive phrase 'dynamically modify their problem-solving techniques' elaborate on the nature of the crows' behavior.
These structural clues confirm that the target word must denote adaptability or capacity for change.
3
Synthesize contextual clues to select an appropriate term.
The final clause reinforces that their strategies are 'far more malleable,' confirming that terms like 'flexible' or 'adaptive' correctly fill the blank.
Matching the tone and semantic requirements of both the contrast and elaboration signals yields a precise vocabulary fit.

Key Concept

Deciphering Meaning via Structural Clues and Contrast/Continuation Signals
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Deciphering Meaning via Structural Clues and Contrast/Continuation Signals

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