Answer:
The wall represents two very different things. First, it represents the literal physical walls the Wanderer comes upon during his travels upon the sea. Second, the wall is a figurative concept that symbolizes the mental walls the Wanderer must scale in order to find security.
Step-by-step explanation:
The two paragraphs you can do are of the different meanings. I pulled this answer from enotes.com if that helps, and it will provide more context to the symbolism of the wall.