Question

Difficulty: Very hardIdentifying Main Conclusions

Read the following argument carefully. Match each excerpt from the argument (on the left) with the statement that most accurately describes its structural role in the argument (on the right).

"Proponents of 'rewilding' argue that reintroducing apex predators to disturbed ecosystems will naturally restore ecological balance. They base this on the assumption that these ecosystems still possess the underlying carrying capacity to support such predators. This assumption, however, is demonstrably false. Decades of intensive agriculture have fundamentally altered soil microbiomes, drastically reducing the primary productivity that forms the base of the food web. Because of this reduction, herbivore populations cannot recover to historical levels. It follows that reintroduced apex predators would quickly exhaust their prey base and face starvation. Consequently, rewilding efforts that focus on apex predators without first restoring soil health are destined to fail. The true path to ecological restoration must therefore begin at the microscopic level."

  • reintroducing apex predators to disturbed ecosystems will naturally restore ecological balanceA conclusion drawn by proponents of a policy that the author seeks to discredit.
  • these ecosystems still possess the underlying carrying capacity to support such predatorsAn underlying assumption of the opposing view that the author identifies as empirically false.
  • herbivore populations cannot recover to historical levelsAn intermediate conclusion drawn directly from the argument's core factual premise regarding environmental damage.
  • rewilding efforts that focus on apex predators without first restoring soil health are destined to failA subsidiary conclusion that evaluates the likely outcome of the opposed policy, providing direct support for the author's final claim.
  • The true path to ecological restoration must therefore begin at the microscopic levelThe ultimate conclusion of the argument, offering a prescriptive claim derived from the anticipated failure of an alternative strategy.

Answer

The excerpts accurately map to their structural roles by tracing the argument from the opposing view, through the author's premises and subsidiary conclusions, to the final prescriptive main conclusion.
The argument follows a classic structure: it introduces an opposing view, attacks the assumption underlying that view with factual evidence, builds a chain of intermediate conclusions to show why the opposing view's policy will fail, and concludes with a prescriptive claim about what should be done instead. Each excerpt fits perfectly into this structural analysis.

Step-by-Step Solution

1
Identify the opposing view and its basis.
The argument starts by outlining the proponents' conclusion ('reintroducing apex predators... will naturally restore') and the assumption they base it on ('ecosystems still possess... carrying capacity').
Understanding the context of the author's critique requires first identifying what specific claims the author is responding to.
2
Trace the author's counter-argument chain from the initial premise.
The author introduces a factual premise about altered microbiomes, which directly leads to the intermediate conclusion about herbivore populations ('herbivore populations cannot recover...').
This establishes the causal chain of evidence that refutes the proponents' assumption about carrying capacity.
3
Identify the major subsidiary conclusion regarding the proposed policy.
The chain of evidence leads to the conclusion that the proponents' specific policy of focusing on apex predators will fail ('rewilding efforts... are destined to fail').
This evaluates the outcome of the opposed policy based on the author's evidence, setting up the final takeaway.
4
Locate the final, overarching point the author is trying to prove.
The argument culminates in a prescriptive claim about how restoration should actually be handled ('The true path... must therefore begin at the microscopic level').
The main conclusion must be the statement that is supported by the rest of the argument but does not support any further claim.

Key Concept

Identifying Main Conclusions and Diagramming Argument Structure
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