Answer:
serotonin, dopamine, or norepinephrine
Explanation:
Belinda has been depressed lately and is having suicidal thoughts. We assume that her brain has low levels of serotonin, dopamine, or norepinephrine
.
Serotonin, dopamine or norepinephrine are responsible for the feeling of happiness and pleasure, When their levels especially serotonin is low in the brain, it could lead to a feeling of depression. Antidepressants are sometimes prescribed to balance the levels of these neurotransmitters in depressed individuals.
