Final answer:
Rising global temperatures have caused sea ice to melt, leading polar bears to move onto land and seek alternative food sources as their traditional hunting grounds disappear.
Step-by-step explanation:
The change in global temperatures has affected the behavior of the polar bear significantly. Polar bears rely on sea ice as their primary hunting platform to catch seals, their main source of food. With the melting of sea ice due to rising global temperatures, polar bears are facing challenges, which include having to travel longer distances to reach the remaining ice, increasing the risk and energy required for hunting.
This dire situation has led to polar bears moving off the sea ice and onto land and eating different kinds of food, as they need to adapt to the diminishing ice coverage and find alternative food sources. This is one of the primary impacts of global warming on polar bear behavior.