The answer to your question is the letter A
The answer is
(B)
Since Prairie dogs provide both shelter and increased prey abundance,
when prairie dogs and their habitat decline, it causes a decline in
burrowing owl numbers. If fewer prairie dogs remain to
create and maintain these unique patches of habitat, the burrowing owl somewhat
declines and becomes endangered with time.
A is the answer.
None of the world's largest cities are in Western Europe. Moscow is not in western Europe either.