Which of the following symptoms is a key characteristic of Reye's Syndrome?

Liver damage is indeed a key characteristic of Reye's Syndrome, a rare but serious condition that primarily affects children and is linked to the use of aspirin during viral infections, particularly influenza and chickenpox. This condition leads to acute encephalopathy and fatty degeneration of the liver, which can result in severe complications and can be life-threatening if not recognized and treated promptly. The symptoms associated with Reye's Syndrome often include confusion, seizures, and loss of consciousness, which are indicative of the brain's involvement, but the liver damage is a hallmark of the condition that can be identified through liver function tests and clinical evaluation.

In contrast, webbed neck, delays in motor skills, and stunted growth are not symptoms associated with Reye's Syndrome. These options relate more to congenital conditions or developmental disorders, demonstrating how important it is to correctly identify symptoms related to specific medical conditions for effective diagnosis and treatment.