The hormone that is most known for helping cope with stress is serotonin. It plays a role in regulating mood, anxiety, and stress. Higher serotonin levels are often associated with feelings of well-being and happiness, while lower levels are linked to depression and anxiety.
- Serotonin is involved in mood regulation, stress management, and relaxation.
- Calcitonin is a hormone involved in calcium regulation and bone metabolism.
- Melatonin regulates sleep-wake cycles, but it is not directly involved in stress coping.
- Testosterone is a hormone related to reproduction, but it does not play a direct role in stress coping.
Thus, the correct answer is (a) Serotonin.