Step 1: Understanding the Concept:
This question asks about the physical description of the main character in Laxmi Prasad Devkota's poem, 'The Sleeping Porter'.
Step 2: Detailed Explanation:
The poem describes a porter who carries heavy loads in the mountains. This kind of work requires immense physical strength.
A person who is strong and solidly built can be described as stout. The poem portrays him as a "champion" and a "king of the mountain," highlighting his power and resilience. While the poem doesn't use the exact word "stout," it is the best description among the choices for a strong, muscular, and robust man capable of carrying a 25-kilogram load on his back. 'Slim' would be too weak, while 'Handsome' or 'Ugly' describe appearance, not build.
Step 3: Final Answer:
The porter has a strong, solid, and stout figure, suited to his physically demanding job.