Threatening behavior causes a fight-or-flight response in animals, and all animals, including fish, are in the Animalia kingdom. Given these facts, what behavior causes a fight-or-flight response in those in the Animalia kingdom among the following options:
- some mammals
 - insects
 - bullfrogs
 - reproductive
 - nurturing
 - threatening
 - foraging
 - hypothyroidism


 

      threatening   