Fact 1: Better senses have a positive impact on an animal 's survival.

Fact 2: Dolphins have an additional sense called echolocation.

Given the two facts above, answer the question "What has a positive impact on an animal's survival?" with the following options: 
- human hunting
 - echolocation
 - peachleaf willow
 - a lack of human aid
 - four limbs
 - a band aid
 - sensory neurons
 - genetic diversity


 

  echolocation       