Many Seychelles warblers of breeding age forgo breeding, remaining instead with their parents and helping to raise their own siblings. This behavior, called cooperative breeding, results from the scarcity of nesting territory for the birds on the tiny island that, until recently, was home to the world’s population of Seychelles warblers. Yet an experiment, most of those warblers maintained a pattern of cooperative breeding.
What this question is testing
Your task
Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.
Common trap
Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.
Winning move
Predict what a right answer must do, then test each choice against the conclusion-evidence gap.
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