Is it talking about their sugars? I need a little more detail..
Answer: The earth is heated by incoming solar radiation. (The sun) And returns some of it through the atmosphere
The Arctic fox is specifically made to survive extreme cold weathers, it has a very thick fur coat that keeps it very warm. Also, Arctic foxes change the color of their fur with the seasons. In winter they are white to blend in with the snow, while in the summer they change to brown. Hope this helps.
I would say reasonable evidence that was 110% true. Otherwise you are putting possiblly false information into the cell theory :)
