Staying warm has a positive impact on an animal 's survival, and animals that survive develop an immunity, but are also carriers for life. Given these facts, what has a positive impact on an animal 's ability to be a carrier for life among the following options:
- four limbs
 - staying frosty
 - staying isolated
 - prolactin release
 - staying warm
 - staying mad
 - coded genes
 - organic molecules


 

     staying warm    