What sets apart fear, anxiety, and depression?

 

Does fear manifest primarily as an emotion or a reactive behavior? Are specific brain regions responsible for triggering our fear responses, and is this within the realm of normal functioning? At what point does fear evolve into anxiety? How does anxiety escalate to the point of being debilitating, and what factors contribute to this progression? Can we effectively manage and control fear and anxiety? What role do neurotransmitter levels, like dopamine and serotonin, play in the brain's fear mechanisms? Is depression a manifestation of anxiety and fear? To what extent does genetics versus the environment influence these conditions? How can one effectively cope with these challenges? Can a deeper understanding of the underlying mechanisms aid in improved treatment, potentially through the utilization of antidepressants?