DISCUSSION: Passage A was concerned with the effects of invasive species. It told us that ecologists are worried that all habitats are vulnerable.
Passage B presented an argument for why Passage A’s concern was unfounded. Invasive species are not dangerous (though that doesn’t necessarily mean we should encourage them).
- Neither passage discussed the causes of invasive species.
- Passage A questioned an old assumption about invasive species (Elton’s), not a common assumption. Passage B didn’t confirm Elton’s assumption – it said invasive species were not a threat at all.
- Passage B’s point was that invasive species aren’t bad. They didn’t say they were good. If invasive species were good, then we should encourage more species invasions. But passage B didn’t recommend that. Also, passage A didn’t show that everyone though invasive species were bad. They just said ecologists think so.
- CORRECT. Passage A warns about the dangers of invasive species; it describes the beliefs of ecologists. Passage B argues that the ecologists have an incorrect definition of nature, and that invasive species are not harmful. Note that ‘not harmful’ isn’t the same thing as ‘good’.
- Passage A doesn’t say what we should do. Passage B does more than ‘raise questions’ about Passage A’s argument: Passage B disagrees completely.
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