Answer:
Option c: Serotonin
Explanation:
Serotonin
This is a known neurotransmitter. It has a wide-ranging effects and it simply and actively involved in dreaming and in controlling emotional states, anger, anxiety, and depression in humans. It is said to be produced by neurons in the subcortex and brain stem and thereafter projected into cortex via pathways.
It is said to be projected to brain parts e.g. hippocampus, hypothalamus, amygdala, striatum, cortex etc. It influences arousal, mood, anxiety, aggression, control of eating, sleeping etc. too little serotonin can cause depression and OCD.