Andy has decided to seek medical for mood disturbances and appetite problems. which neurotransmitter is most likely involved in the problems andy is experiencing?

The neurotransmitter that would likely involved in the problems serotonin. This neurotransmitter involves in the mood or feelings of the person in which Andy has been experiencing a mood disturbance without any particular reason. The serotonin could have cause a problem that may contribute to the disturbances that Andy has been experiencing.

Where is the graph i don't see the graph