Final answer:
Elisabeth Kübler-Ross found that death is an orderly transition involving specific stages, namely denial, anger, bargaining, depression, and acceptance. These stages constitute her influential five stages of grief model.
Step-by-step explanation:
In her research on death and dying, Elisabeth Kübler-Ross identified that death is an orderly transition involving specific stages. This discovery is outlined in her 1969 book On Death and Dying, in which she detailed the process of dying into five distinct stages: denial, anger, bargaining, depression, and acceptance. Thus, the answer to the student's question would be that death is an orderly transition involving specific stages (Option 2).
Kübler-Ross's findings revolutionized the understanding of the end-of-life process and gave healthcare professionals and sociologists a framework to support individuals who are facing their own mortality. Her model is still impactful today; however, it is important to note that these stages are not experienced in a linear fashion by all individuals, and not everyone goes through all stages.