The area of floating ice in the Arctic waters has gradually decreased, reducing the total by about 20%, making it difficult for polar bears to stand on the ice for a long time. In addition, some countries have hunted seals in large numbers. It is difficult to hunt seals on ice floes. When we arrived at a bay near 80 degrees north latitude on the northwest coast of the island of Spitzbergen in the Arctic, we were surprised to shoot the entire process of polar bear fishing. The habit of living and "no water" began to jump out of the icy seawater to catch fish for food. This passage is sufficient? ['The Arctic environment is getting worse.', 'Natural selection, the survival of the fittest.', 'Smart species are more difficult to adapt to the environment.', 'Environmental changes have changed the habits of polar bears.']