("Dead", "Died", "Deceased", and "Dying" redirect here. For the personification of death, see Death (personification). For the Alice in Chains song, see Died (song). For the coloring process, see Dyeing. For the American heavy metal bands, see Deceased (band) and Death (metal band). For the rock band, see Death (protopunk band). For other uses, see Dead (disambiguation) and Death (disambiguation).) Death is the termination of all biological functions that sustain an organism. Phenomena which commonly bring about death include biological aging (senescence), predation, malnutrition, disease, suicide, homicide, starvation, dehydration, and accidents or trauma resulting in terminal injury. Bodies of living organisms begin to decompose shortly after death. Death has commonly been considered a sad or unpleasant occasion, particularly for humans, due to the affection for the being that has died and/or the termination of social and familial bonds with the deceased. Other concerns include fear of death, necrophobia, anxiety, sorrow, grief, emotional pain, depression, sympathy, compassion, solitude, or saudade. The potential for an afterlife is of concern for humans and the possibility of reward or judgement and punishment for past sin with people of certain religions.