In which biome do polar bears primarily inhabit?

Polar bears primarily inhabit the polar or permafrost biome, which is characterized by extreme cold temperatures, ice-covered regions, and a unique ecosystem that includes sea ice. This biome provides the essential hunting grounds for polar bears, allowing them to hunt for seals, which are their primary food source. The stability of sea ice is crucial for their survival, as it acts as a platform for them to access the ocean and prey.

While the tundra biome is also cold and has limited vegetation, it does not specifically encompass the icy environments where polar bears thrive. The taiga biome, dominated by coniferous forests, is found at slightly warmer latitudes and does not offer the icy conditions that polar bears need for hunting. The desert biome, with its lack of moisture and extreme temperatures, is not suitable for their survival. Thus, the polar or permafrost biome is the correct habitat for polar bears, as it aligns with their physical and ecological requirements.