Answer:
White
Step-by-step explanation:
This question is a bit logical
Let the man live at point A
From point A , he travels 5 Km towards west to point B ----
From point B, he again travels towards north at point C --
From pint C , he travel 5 Km towards the south to reach his house.
In the last step, he traversed through the entire North region hence there is probability that he must have seen the polar bears. Therefore the color of bears would be white.