2)It challenges them because one one day there could be a storm and the next day it could just be all calm and stuff then the next couple of days it could be a storm.
3)They have to adapt to different environments and different predators because if they go to one place and the weather is cold and the ice is sold then there there predators would most likely be birds but if they are places wheres there's water then there predators are going to be sea lions.
4)There's no sunlight because they are on the opposite pole and it effects the climate because it will get really frozen and they don't want to be anywhere where the ice is not solid because then there young one can fall through the ice and they are worried about that.
5)The ground has to be solid frozen so that there little ones won't fall through the ice also the climate can change because if the weather is really cold then they are gonna have to all get to together and that means that they won't be able to mate with each other.
