Read the passage below. Identify which sentence functions as a concession that acknowledges a methodological limitation of the primary comparative framework under discussion.
Answer:[Sentence 1] In palaeoclimatology, the mid-Pliocene Warm Period is frequently analyzed as an analog for projected global warming scenarios because atmospheric carbon dioxide concentrations were comparable to contemporary levels. [Sentence 2] Proponents of this comparative framework argue that sea surface temperature anomalies during the Pliocene offer valuable insight into equilibrium climate sensitivity under sustained greenhouse forcing. [Sentence 3] Admittedly, disparities in ancient continental topography and polar ice sheet extent preclude an exact equivalence between Pliocene climate dynamics and modern anthropogenic warming trajectories. [Sentence 4] Nevertheless, evaluating Pliocene ocean circulation patterns yields essential empirical benchmarks for refining long-term climate models.
Sentence that serves as the concession: 【Sentence 3】
Sentence that serves as the concession: 【Sentence 3】
Answer
Sentence 3 functions as a concession because it introduces a countervailing fact—disparities in topography and ice sheet extent—that limits the direct applicability of the mid-Pliocene comparative framework.
Sentence 3 is the correct response because it uses the structural transition word 'Admittedly' to acknowledge a specific limitation—namely, that geographical and cryospheric differences between the Pliocene epoch and the present prevent a direct, one-to-one comparison.
Step-by-Step Solution
Key Concept
Rhetorical Structure and Sentence Function
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