Answer:
b. dopamine is the correct answer.
Step-by-step explanation:
dopamine is the neurotransmitter regulates mood, emotional behavior, motor control, and orgasms.
Dopamine is a chemical that is released by neurons and transmits the signals between the nerve cells of the brain.
Dopamine plays a major role in regulating the movement, emotional response, and motor system.
When the brain is not able to produce sufficient dopamine it may result in Parkinson's disease.