The Wear-and-Tear Theory proposes that aging is caused by the gradual deterioration of cells and tissues due to everyday wear and tear.

Senescence refers to the natural process of aging and the associated decline in physical and mental functions.

In Kübler-Ross's five stages of grief, anger is a common emotional response to the realization of impending death.

Death Acceptance refers to the attitude of accepting death as a natural and inevitable part of life.

The Telomere Theory proposes that aging is a result of the progressive shortening of telomeres, leading to cellular senescence and eventual death.

Retribution refers to the belief that death is a form of punishment for sins or wrongdoings committed during life.

Bargaining is a stage in Kübler-Ross's model where individuals attempt to negotiate with a higher power or fate in order to prolong their life or delay death.

Reincarnation refers to the belief that after death, the soul or essence of a person is reborn into a new body.

The Error Catastrophe Theory proposes that aging is caused by the accumulation of errors in DNA replication and repair, leading to cellular dysfunction and death.

Death Transcendence refers to the belief that death is a natural and inevitable part of life and should be celebrated rather than mourned.

Depression is a stage in Kübler-Ross's model where individuals experience feelings of sadness, hopelessness, and withdrawal as they come to terms with the reality of their impending death.

Nihilism refers to the belief that life is meaningless and that death is the ultimate end of existence.

The Environmental Theory proposes that aging is caused by the accumulation of damage to DNA and other cellular components due to exposure to environmental toxins and stressors.

Agnosticism refers to the belief that the existence or non-existence of a higher power or afterlife cannot be known or proven.

Acceptance is the final stage in Kübler-Ross's model, where individuals come to terms with their impending death and find peace and acceptance.