Final answer:
The denial stage of grief acts as a shield against unbearable reality, and it is the first phase in the Kübler-Ross's five-stage model of grief.
Step-by-step explanation:
The denial stage of grief is a normal defense mechanism that buffers humans from unbearable reality. This form of denial is characterized by individuals not wanting to believe the direness of their situation, often thinking "I feel fine" or "This is not really happening to me." As part of the Kübler-Ross's five-stage model of grief, denial serves as the first stage, preceding anger, bargaining, depression, and finally, acceptance. The process of moving through these stages can vary greatly among individuals, with some not experiencing all stages or going through them in different orders. This model aids in understanding the complex emotional reactions humans experience when confronted with death or significant loss.