Why can't we just air-drop food to hungry polar bears to ensure their survival? Dr. Steven Amstrup, polar bear project leader for the US Geological Survey in Alaska answers this question.

Question: Why can't we just air-drop beef, processed leftovers, or other food to the polar bears to ensure their survival?

Answer: Of course we could drop food to feed polar bears. In the short run, we might be able to enhance the survival of some number of bears. However, one
must consider the magnitude of such an undertaking. Polar bears are scattered over millions of square kilometers of habitat. If all were forced ashore due to disappearing sea ice, they would be scattered over a couple hundred thousand kilometers of coastline. Flying these coastlines in aircraft equipped to drop food would be enormously expensive and would contribute hugely to our already runaway greenhouse gas emissions. In other words, feeding them in the short run would contribute to habitat loss in the long run.

In the long run, even if we could find a food which would substitute for
seals—and beef would not do it because of the requirement for very high
fat in the diet of polar bears—we would be converting these predators to
scavengers. IF we were to facilitate the survival of many, many generations of
bears by turning them into scavengers, they would be poorly equipped to go
back onto the ice to hunt if and when it returns. Air drops would be
little different than keeping bears in zoos in the hope of relocating them to
the wild when the ice returns. The bears would have lost their skills and
would not be able to survive even if the ice came back.