Final answer:
The emperor penguin lives in the coldest climate, while the polar bear lives in the warmest among the three listed. Polar bears would be most affected by the melting of sea ice in Alaska. They have adaptations like thick fur and fat for insulation and white fur for camouflage.
Step-by-step explanation:
Of the three animals listed, the emperor penguin lives in the coldest climate. The polar bear lives in the warmest climate of the three, with a habitat temperature of -90°F. When considering which animal would be most affected by the melting of sea ice in Alaska, the polar bears would be most impacted due to their dependency on the ice for hunting seals.
Polar bears have specialized adaptations such as thick fur and a dense layer of fat under their skin to maintain their body temperature in their icy habitat. This insulation allows them to thrive in the Arctic ecosystem. The white fur of polar bears is also an adaptation in an Arctic biome, providing camouflage against the snow and ice, crucial for hunting.