Why are polar bears endangered on the tundra?

Polar bears are considered endangered primarily due to climate change, which leads to the melting of sea ice in the Arctic. This loss of habitat significantly impacts their ability to hunt seals, their main prey, and affects their overall survival. Additionally, oil exploration and shipping activities pose further threats by increasing the risk of oil spills and disturbances in their environment. As a result, polar bears face challenges in finding food and breeding grounds, contributing to their endangered status.