Let's do a quick POE.
Being America’s national bird, the Bald Eagle has little natural predators like the Great Horned Owl, and their population dwindling to almost nothing up to the point of DDT being banned.A)
Being America’s national bird, the Bald Eagle has little natural predators like the Great Horned Owl, and
their population dwindling to almost nothing up to the point of DDT being banned.
Usage of Being = be + ing (present continuous) is wrong. Because Bald Eagle is America's national bird - a fact which has to be stated in simple present. Another blatant error is in the
pronoun usage.
'to the point of ddt being banned' is ungrammatical too.
B) Like the
Great Horned Owl, the
Bald Eagle, America’s national bird, has few natural predators, yet
its population dwindled to almost nothing until DDT was banned.
Looks good. No
pronoun error. Yet is the co-ordinating conjunction contrasting the two independent clauses.
Comparison is correct.
C) The Bald Eagle, like the Great Horned Owl, America’s national bird, has
little natural predators, but
their population having dwindling to almost until DDT had been banned.
little for countable nouns is wrong usage.
their seems to refer to predators and not the eagle. dwindled to '
nothing' is the proper usage (
which is missing)
D) The Bald Eagle, America’s national bird, has a very small number of natural predators, as does the Great Horned Owl, but its population
dwindling to almost nothing until DDT is banned.
comparison of bald eagle having small number of predators with that of great horned owl seems good.
but is a coordinating conjunction and hence must be followed by an independent clause. The italicized part is not a clause -
no verb.
E) The
Bald Eagle, which is America’s national bird,
has few natural predators as the
Great Horned Owl, as its population dwindling to almost nothing until DDT was banned.
comparison is wrong. We are comparing bald eagle having .. with great owl. 'as' breaks the contrast. 'verb' needed after population.
Clearly, B is the correct answer.