Question

Difficulty: Very hardDetermining Paragraph Function and Structural Role

Read the following passage carefully:

For decades, paleoclimatologists attributed the mid-Holocene thermal maximum primarily to orbital forcing, asserting that peak insolation directly governed global surface temperature shifts. Under this prevailing view, early climate simulations presumed a synchronous, planet-wide thermal response to astronomical cycles.

However, recent multi-proxy reconstructions from high-latitude marine sediments revealed pronounced thermal asymmetries that orbital models failed to predict. To account for these discrepancies, dynamic vegetation feedback theories emerged, contending that land-surface albedo changes amplified localized warming independently of direct solar radiation.

Most recently, synthesis studies have demonstrated that these proxy anomalies stem from seasonal recording biases inherent to marine planktonic organisms rather than true mean-annual temperature shifts. By accounting for this proxy seasonality, researchers reconciled the divergent models, establishing that orbital forcing dictates the foundational climate trajectory while vegetation dynamics act strictly as a secondary, seasonally constrained modifier.

Below are three descriptions of the structural functions performed by the paragraphs in the passage. Arrange the descriptions in the correct sequential order matching Paragraph 1, Paragraph 2, and Paragraph 3.

  1. 1Outlines a long-standing scientific consensus and its underlying theoretical premise regarding a global phenomenon.
  2. 2Presents observational data that conflicts with the established paradigm and details a competing explanatory hypothesis.
  3. 3Resolves the theoretical contradiction by exposing a methodological artifact, thereby establishing a qualified synthesis of both views.

Answer

The correct order of structural functions from Paragraph 1 to Paragraph 3 is: first, outlining the long-standing consensus; second, presenting conflicting data and a competing hypothesis; and third, resolving the contradiction through a methodological insight to create a qualified synthesis.
The passage follows a classic thesis-antithesis-synthesis structure. Paragraph 1 establishes the initial consensus (thesis). Paragraph 2 introduces anomalous data and a rival explanation (antithesis). Paragraph 3 exposes a recording bias that resolves the discrepancy, harmonizing the two perspectives into a qualified framework (synthesis). Therefore, placing the description of the long-standing consensus first, the conflicting data/competing hypothesis second, and the methodological resolution/synthesis third correctly reflects the passage's logical progression.

Step-by-Step Solution

1
Analyze the structural role of Paragraph 1.
Paragraph 1 establishes the traditional paleoclimatological paradigm (orbital forcing) and its core premise (synchronous planetary response).
Determining how the passage introduces the subject matter sets the baseline for the argumentative arc.
2
Analyze the structural role of Paragraph 2.
Paragraph 2 introduces empirical counter-evidence (marine sediment proxy asymmetries) and presents a new rival theory (vegetation feedback).
Identifying the transition marker ('However') reveals a shift from consensus to challenge and counter-hypothesis.
3
Analyze the structural role of Paragraph 3.
Paragraph 3 explains that the counter-evidence was flawed due to seasonal proxy bias, allowing researchers to harmonize both models into a nuanced synthesis.
Recognizing the resolution step completes the logical progression of the passage.

Key Concept

Determining Paragraph Function and Structural Role
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