Anxiety disorders have been linked to low activity of the ____ neurotransmitter.

Gamma Aminobutyric Acid

The correct answer is Option (1) → Gamma Aminobutyric Acid

Anxiety disorders have been linked to low activity of the neurotransmitter gamma aminobutyric acid (GABA), schizophrenia to excess activity of dopamine, and depression to low activity of serotonin.