medium · LSAT Logical Reasoning
Biologist: A recent study suggests that a certain species of bird has begun migrating earlier in the year due to rising global temperatures. Critics point out that several other factors, such as changes in local food sources, could also explain this shift.
Which of the following, if true, would most strengthen the biologist's argument against the critics' objection?
- The bird species is known to be highly adaptable to various environments.
- Global temperatures have risen more sharply in the birds' wintering grounds than in their nesting grounds.
- Other bird species in the same region have not changed their migration patterns.
- The food supply the birds rely on has held steady for decades, ruling out the alternative the critics raised.
- Earlier migration has been shown to improve the survival odds of the birds' offspring.
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