Why do polar bear has only one cub at a time?

Polar bears typically have only one cub at a time to ensure better survival rates for the offspring in the harsh Arctic environment. Raising a single cub allows the mother to devote more resources, attention, and energy to its care and nurturing, increasing its chances of survival. Additionally, the energy demands of pregnancy and lactation in such a challenging habitat make it difficult for polar bears to sustain multiple cubs. This reproductive strategy helps balance the needs of the mother and the cub in a resource-scarce environment.