What describes the complete and irreversible end of metabolic processes?

C is the correct answer because it specifically refers to the state in which all biological functions that sustain life have permanently ceased. This includes the irreversible cessation of all metabolic processes necessary for maintaining life, such as respiration, circulation, and cellular activity.

Understanding this definition is crucial because it signifies a point in time when the body cannot recover, and no physiological functions indicative of life are observable. In clinical terms, death is confirmed through various indicators, such as the absence of brain activity or heartbeat, which are essential for sustaining life.

In contrast, the other choices refer to related but distinct concepts. Clinical death indicates a state where vital signs, such as heartbeat and respiration, are absent, but resurrection may still be possible through medical intervention. Organ failure refers to the malfunction of one or more organs, which can potentially be treated or managed, while a terminal condition suggests that a disease or health issue will ultimately lead to death but does not necessarily denote that metabolic processes have completely and irrevocably ended.