(GRE Success! ) Dear all

Can any one tell me that are there any solutions or written answer essays
of the argument pool given by Ets website?

2nd,can any one tell me what are the possible fallacies in the folowing
ARGUMENT ESSAY FROM ETS GRE POOL 2012

""Arctic deer live on islands in Canada's arctic regions. They search for
food by moving over ice from island to island during the course of the
year. Their habitat is limited to areas warm enough to sustain the plants
on which they feed and cold enough, at least some of the year, for the ice
to cover the sea separating the islands, allowing the deer to travel over
it. Unfortunately, according to reports from local hunters, the deer
populations are declining. Since these reports coincide with recent global
warming trends that have caused the sea ice to melt, we can conclude that
the purported decline in deer populations is the result of the deer's being
unable to follow their age-old migration patterns across the frozen sea ""

ANY HELP WOULD BE HIGHLY PRAISED!