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

Fact 2: Dogs are highly social animals.

Given the two facts above, answer the question "Threatening behavior causes a fight-or-flight response in what?" with the following options: 
- Whales
 - dogs
 - hair
 - Birds
 - humans
 - hats
 - bacteria
 - bears


 

  dogs       