What is the primary function of the serotonin system in emotional well-being?

The primary function of the serotonin system in emotional well-being is to regulate mood and anxiety. Serotonin is a neurotransmitter that plays a crucial role in modulating various psychological functions, including mood regulation. It is often referred to as a "feel-good" neurotransmitter because it contributes to feelings of happiness and well-being. Low levels of serotonin are associated with mood disorders, such as depression and anxiety disorders, highlighting its significant role in emotional stability.

This understanding of serotonin's role extends to how treatments for depression and anxiety, such as selective serotonin reuptake inhibitors (SSRIs), function by increasing serotonin levels in the brain, suggesting that enhancing serotonin's activity can improve mood and alleviate anxiety symptoms. Thus, option C correctly identifies the central role of the serotonin system in emotional well-being.