Final answer:
The state characterized by mental peace and physical calmness is relaxation. Methods to achieve relaxation include quiet environments, comfortable seating, and mental focus exercises.
Step-by-step explanation:
The state at which a person is mentally relaxed, free from worry, and is physically calm is known as relaxation. This state can be achieved through various methods such as sitting upright on a comfortable chair, being in a quiet environment, using a mantra like “alert mind, calm body,” and focusing the mind on pleasant thoughts. Practices like meditation and the relaxation response approach are designed to usher in this state of relaxation and have been found to provide health benefits such as reducing sympathetic arousal and treating high blood pressure.