Animals are adapted to survive in the conditions in which they live. Animals living in very cold and hot climate must possess special features to protect themselves against according to climate.
eg : Polar bears have white fur so that they are not easily visible in the snowy white background. It protects them from their anemies. snow and fur both are same white colour, It also helps them in catching the prey also. To protect them from extreme cold, they have too thick layers of fur maintain body temperature also . They also have a layer of fat under their skin. In fact, they are so well-insulated that they have to move slowly and often rest to avoid getting overheated.
Same as, In rainforests, Red-eyed frog has developed sticky pads on its feet to help it climb trees on which it lives.