SORU: aşağıdaki parçaya göre cevaplayınız
It is clear from the passage that the Channel Islands fox is in danger of disappearing altogether due mostly to ----.
The Channel Islands fox is one of America's most
photogenic creatures – and one of its most
endangered. As recently as 1994, scientists
estimated that more than 1,500 of the tiny foxes lived
on Santa Cruz Island, the biggest in the island chain
which lies off the coast of Los Angeles. Today,
however, only about 80 remain in the wild there.
Island mammals, because they're cut off from other
environments, are particularly sensitive to disruptions
in the balance of predators and prey, and it was a
series of unrelated events on the northern Channel
Islands that caused the present crisis. Scientists
discovered in the mid-1990s that most of the foxes
on the islands were being killed by golden eagles,
which had previously been kept away by the
presence of bald eagles, which feed mainly on fish
and seal carcasses. But the bald eagle began to
disappear in the 1950s, the victim of unintended
poisoning by a nearby chemical factory. The factory
had dumped pesticides into the Los Angeles sewer
system, which empties into the ocean. The waste
contaminated the marine wildlife which the bald
eagles fed on, thus contaminating the bald eagles as
well, and by 1960, bald eagles had vanished from the
islands. The bald eagles' disappearance left an
opening for the golden eagles, and by the mid-1990s
golden eagles had become the main predator of the
Channel Islands fox.