You are presented with the question "Arctic animals are assisted in survival by what?" and the following answer choices: 
- genetic diversity
 - anti-freeze
 - food and shelter
 - warm greetings
 - some invertebrates
 - lowered energy cost
 - fat tuesday celebrations
 - layers of fat

Now knowing that staying warm has a positive impact on an animal 's survival and arctic animals have layers of fat and thick coats of fur to keep warm in the frigid Arctic climate, choose the best answer.


 

        layers of fat 