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. Given these facts, how do sea lions keep warm among the following options:
- protected
 - warm
 - Swimming fast
 - Sleeping
 - hydration
 - Blubber
 - four limbs
 - Eating a lot of fish


 

      Blubber   