You are presented with the question "Different behavior patterns cause a fight-or-flight response in what?" and the following answer choices: 
- courtship
 - ecosystems
 - biomes
 - Species
 - Mammal
 - animals
 - trees
 - humans

Now knowing that threatening behavior causes a fight-or-flight response in animals and different behavior patterns are used by a threatened rabbit, choose the best answer.


 

      animals   