Final answer:
a) Guilt
The hardest thing for a grieving owner to work through is typically guilt, fitting the Kübler-Ross model's stages of grief which are denial, anger, bargaining, depression, and acceptance. Reflecting on personal experiences of loss can facilitate empathy with those who grieve, including elderly individuals affected by bereavement.
Step-by-step explanation:
According to the question, the hardest thing for a grieving owner to relinquish may be guilt. In the context of the Kübler-Ross model, the five stages of grief are denial, anger, bargaining, depression, and acceptance, in that order. The question also implies the psychological and emotional challenges one faces during grief, especially when dealing with the emotional reactions of loss to the death of a loved one.
For many teenagers and young adults, losing a grandparent, another older relative, or experiencing any significant loss can be a profound encounter with grief. In the exploration of their personal experiences with loss, whether it's the end of a childhood friendship, the sale of a beloved car, or a change in self-identity like a bad haircut, they can test the stages of grief personally. This reflection can help in understanding and empathizing with others' experiences, such as the elderly who may face mistreatment due to bereavement or other reasons.