Answer:
The organisms interact with the environment to survive. So, it is essential for the organisms to have characteristics that suit the environment. We will study the example of polar bear. Polar bears have white fur so that they are not easily spotted in the snowy white background. It saves them from their predators. It also helps in catching their prey. To protect them from biting cold, they have two thick layers of fur. They also have a layer of fat under their skin. In fact, they are so well ? insulated that they have to move slowly and rest off and on to avoid excess heat. Physical activities on warm days necessitate cooling. So, the polar bear goes for a swim. Polar bears are good swimmers. Their paws are wide and large, which aid them not only in swimming well but also to walk easily in the snow. While swimming under water, they can close their nostrils and can stay under water for long durations. They have a sharp sense of smell so that they can catch their prey for food.
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