Zero degrees latitude is the line designating the Equator and divides the Earth into two equal hemispheres (north and south).
They are well at surviving because of their thick white coat. The white fur helps them blend in with the snow and ice. The polar bear also has a layer of fat under their skin so they can survive harsh temperatures.
<span>a strong downward current of air from a cumulonimbus cloud, usually associated with intense rain or a thunderstorm.</span>
I don't really know but I pick b.have always been vestigial.
