A person with a sound mental well-being is someone who has achieved the state of self-actualization. This status denotes that someone has realized his or her own full potential because he or she can work productively, can cope with the common stresses that life throws at him or her, and is able to make a contribution to his or her own community. Having said that, contributing to the community is an activity that best depicts the sound mental well-being of a person. The other options do not holistically portray a person`s mental well-being; rather, they only show that someone is using his or cognitive skills relatively well.
