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

Fact 2: Stress triggers the fight or flight response within the body.

Given the two facts above, answer the question "What do animals feel when threatened?" with the following options: 
- cold
 - negative
 - Sadness
 - Warmth
 - Stress
 - Calmness
 - deadly
 - influenza


 

     Stress    