Answer choice A suggests that bald eagles should be protected at the expense of other species. Does the author ever say that the bald eagle is more important than these other animals? No. It is clear that the author wants to conserve these more obscure animals as well.
The author is saying that conservation of the bald eagle is necessary for the conservation of other species. These conservation efforts are not at odds. They are in harmony, which is why A is incorrect. B better expresses the main point.
