Final answer:
Eldon's death, confirmed by an EEG showing an absence of brain activity, indicates a biological death, which is the complete and irreversible loss of brain function.
Step-by-step explanation:
Eldon's death, as confirmed by an electroencephalogram (EEG) reading of electrical brain waves, indicates a cessation of the brain's electrical activity. This cessation of activity would signify biological death, which is the irreversible loss of all vital functions, particularly the brain functions. It is different from clinical death, which is a reversible loss of heartbeat and respiration, and more severe than social death or cellular death, which refer to the perceived loss of an individual's societal identity or the death of cells, respectively.
An EEG captures the electrical activity that derives from the interactions of charged ions in the brain. These ions are essential for the communication within the brain, and without this activity, the brain can no longer function. The loss of electrical activity in the brain as recorded by an EEG is a clear indicator of biological death.