You are presented with the question "What does violence cause?" and the following answer choices: 
- Fight-or-flight response
 - life
 - luck
 - fun
 - a lot of human deaths
 - get chemical reactions started
 - a tree falling
 - population movement

Now knowing that threatening behavior causes a fight-or-flight response in animals and violence threatens everyone, choose the best answer.


 

 Fight-or-flight response        