What is the primary characteristic of Cerberus?

The primary characteristic of Cerberus is that it is depicted as a three-headed dog. This creature from Greek mythology is often described as the guardian of the underworld, tasked with preventing the dead from leaving and the living from entering. Each head of Cerberus represents various aspects of his role, including vigilance, protection, and ferocity. The imagery of a three-headed dog has made Cerberus a striking figure in literature and art, symbolizing the barrier between life and death.

In contrast, the incorrect choices do not align with the traditional representations of Cerberus. A single-headed dog, a mythical lion, and a two-headed dragon describe different mythical creatures or characteristics and do not accurately reflect the defining features associated with Cerberus. Understanding Cerberus' role in mythology provides insight into its significance and helps to clarify why the option identifying this creature as a three-headed dog is the most accurate.