Given the question: You are presented with the question "What behavior causes a fight-or-flight response in those in the Animalia kingdom?" and the following answer choices: - some mammals - insects - bullfrogs - reproductive - nurturing - threatening - foraging - hypothyroidism Now knowing that threatening behavior causes a fight-or-flight response in animals and all animals, including fish, are in the Animalia kingdom, choose the best answer.
The answer is:
threatening