Given that more moisture evaporates over warmer water, in global warming one would expect A.
warmer water globally with more moisture in the air over the poles, therefore more snow in the winter
B.
warmer water in tropical regions and less snow in polar regions in the winter
C.
the melting of the polar ice cap at the South Pole
D.
warmer water in polar regions therefore less snow in polar regions in the winter

D.
warmer water in polar regions therefore less snow in polar regions in the winter

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.