Why are polar bears born on a polar night, in a snow den?

All bears give birth in winter in the den. Because under the snow in the den it’s warm and so that by the time of the availability of food in the spring they were already large and could make long transitions for the mother

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.