An invasive species does not need to be dangerous or aggressive to cause serious harm; it only needs to be good at what it does in a place that has no natural check on it. A plant that arrives without the insects, fungi, or grazing animals that limited it back home can spread far faster than in its original range, crowding out native species that evolved alongside those same checks and balances. Removal efforts that succeed tend to act early, before a population becomes so established that eradication is no longer realistic and the only remaining goal is managing its spread rather than reversing it.
Which of the following best summarizes the passage?
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Correct answer to question 107 (Paragraph Comprehension): Invasive species spread rapidly because the checks that limited them at home are absent
Method
The passage explains that a species spreads because it lacks the insects, fungi, or grazing animals that limited it at home, which the second choice restates; it does not claim invasive species are aggressive.
Updated: November 2026
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