The right answer here is <u>D. the rocks that make the wall.</u>
In "And some are loaves and some so nearly balls", "some" refers to the boulders or the rocks that make the wall between them.
He wants to point out that this wall is made of things the shape of which is not really logical (walls are usually made of bricks which perfectly fit one onto the other), such as loaves and balls the same way people build walls in real life based on reasons that are not really logical either, but the wall is somehow kept balanced and standing.
<span>in searching for something better, one may lose what one already has</span>
<span>The character of Penelope is very loyal.</span>
