Final answer:
The correct answer is 'c. Present illness' as the statement provides information on current symptoms and their progression, which is characteristic of the 'Present illness' part of a pediatric health history.
Step-by-step explanation:
The component of the pediatric health history illustrated by the statement "Nausea and vomiting for 3 days. Started with abdominal cramping at present. Unable to keep any foods down but able to drink clear liquids without vomiting. No temperature elevation; no diarrhea." is c. Present illness. This portion of the health history focuses on the current symptoms and the progression of the illness from when it first began. It details the nature and course of the symptoms, which in this case includes the onset of nausea, vomiting, and abdominal cramping, the current status of food tolerance, and the absence of fever and diarrhea.