The author mentions the Nile perch in order to provide an example of

Phung Ha on April 23 at 04:54AM

Why not A

It seems like just an example of a species going extinction through human activity.

1 Reply

on April 26 at 06:29PM

Hello @HannahNg,

This is kind of a tricky question. Why did the author discuss the Nile perch? Is the Nile perch an example of an extinct species? No, because it is not extinct! Rather, it was carelessly introduced to a new habitat, where it is a threat to other species. Take a closer look at the sentence starting on line 38.

This is still the fault of humans, so B is the correct answer.