You are presented with the question "What do better senses have an impact on?" and the following answer choices: 
- passing gas
 - population movement
 - blood type
 - important habitats
 - animals with backbones
 - ability to live
 - body odor
 - athletes

Now knowing that better senses have a positive impact on an animal 's survival and living and surviving are the thing, choose the best answer.


 

      ability to live   