Mortality Salience: Mortality salience is the awareness of one's own eventual death. It can influence people's thoughts, emotions, and behaviors.
Kubler-Ross Model: The Kubler-Ross model (also known as the five stages of grief) describes the emotional states individuals may go through when facing their own mortality or dealing with the impending death of a loved one.
Thanatology: Thanatology is the scientific study of death and dying. It examines psychological, social, cultural, and spiritual aspects related to death and end-of-life issues.