Answer:
What this line suggests about the narrator is that The narrator thinks about different kinds of soil.
Step-by-step explanation:
In the line "It looked like a recently frosted chocolate cake, though the frosting was spread a bit thin for my taste." the narrator is making reference to the quantity of sand that there is above the mud and by the expression for my taste is showing a preference of one over another, then he says that he can not understand why people want to build in there if that kind of mixture of sand and mud was for the presence of a lot of crab holes, which makes this bad soil to construct.