You are presented with the question "How do sea lions keep warm?" and the following answer choices: 
- protected
 - warm
 - Swimming fast
 - Sleeping
 - hydration
 - Blubber
 - four limbs
 - Eating a lot of fish

Now knowing that mammals have a layer of fat under the skin to help insulate the body and harbor seals, like sea lions, have evolved to utilize a layer of fat called blubber, choose the best answer.


 

      Blubber   