What are some examples of the mundane portions of the story, and in what ways is Gregor's fantastical metamorphosis symbolic?

As far as some of the
more mundane portions of the story, not much seems very ordinary or dull. Since every
conversation or action seems to occur as a result of Gregor turning into a giant bug, even
conversations that might normally seem dull or commonplace suddenly take on new meaning.
Gregor's observations concerning the "quiet life" his hard work had made for his
family are relatively mundane, as are the descriptions of the family's routines, at least prior
to the boarders arriving. The family's conversations regarding money might be considered
mundane: a great many families worry about finances. Descriptions of Grete's cleaning Gregor's
room and even bringing him food are somewhat mundane as well: cleaning and bringing food for a
sick relative are...