Fact 1: Threatening behavior causes a fight-or-flight response in animals.

Fact 2: True False Fight or flight are extreme responses to stress.

Given the two facts above, answer the question "what does threatening behavior cause in animals?" with the following options: 
- negative
 - stress
 - dog
 - knife
 - disease
 - Movement
 - influenza
 - h2o


 

  stress       