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

Fact 2: Different behavior patterns are used by a threatened rabbit.

Given the two facts above, answer the question "Different behavior patterns cause a fight-or-flight response in what?" with the following options: 
- courtship
 - ecosystems
 - biomes
 - Species
 - Mammal
 - animals
 - trees
 - humans


 

      animals   