Final answer:
The characteristic that Gilgamesh shows in the passage is that he embarks on a long journey in search of immortality, reflecting his struggle with the inevitability of death.
Step-by-step explanation:
To answer the question about which characteristic Gilgamesh shows in the provided passage, we need to consider the context of The Epic of Gilgamesh, an ancient Mesopotamian narrative. In this epic, we learn about the partly-divine king of Uruk, Gilgamesh, and his quest for immortality after the death of his friend Enkidu.
This quest reflects his struggles with human frailty, the inevitability of death, and his desire to find a means to overcome it. The specific characteristic mentioned in the passage is that he embarks on a long journey.
This journey represents a pivotal aspect of the story, demonstrating his determination to confront the existential issue of mortality. No other options provided in the question, such as being a compelling speaker, receiving help from a supernatural force, or not enough information are directly supported by the quoted text.