Final answer:
A single, separate, systematic process upon or within the body that can be complete in itself is called an episode. Examples include an asthmatic episode, which encompasses the onset, treatment, and resolution of an asthma attack. Option D is correct.
Step-by-step explanation:
The single, separate, systematic process upon or within the body that can be complete in itself is called an Episode. An episode in a health context refers to a distinct event or a series of related healthcare events that a patient experiences.
For example, an asthmatic episode would involve the onset, treatment, and resolution of an asthma attack. These can be seen as individual incidents that do not necessarily have a continuous or permanent status like a condition but are rather isolated occurrences.