Answer:
acting in an aggressive, hostile behavior.
Explanation:
Aggressive behavior is determined as an individual's impulsive and reactionary behavior that produces a consequence of breaking or destroying household rules & regulations or laws. Aggressive behavior is often considered as unpredictable and violent.
Hostile behavior is considered as a type of "emotionally charged" aggressive behavior. It is considered as another word for aggression and anger.
In the question above, the given statement signifies "acting in aggressive & hostile behavior".