Answer:
Gilgamesh proved his bravery when he engaged in a battle with a strong and fierce antagonist.
Explanation:
The given excerpt is taken from the "Epic of Gilgamesh" written anonymously.
The given excerpt tells of the bravery and courage of Gilgamesh when he defeated the most dreaded and fierce monster named Humbaba. Though Gilgamesh was at first frightened by the sight of Humbaba, but later he took the courage and beheaded the beast.
Since the paragraph describes the acts of bravery of Gilgamesh, the introduction should be about the same.
So, the correct and apt introduction to the paragraph would be that Gilgamesh proved his bravery and defeated Humbaba, the strong a fierce antagonist.