In "A Very Old Man with Enormous Wings", how does Marquez use fantasy to reveal a human truth?

In
"" Marquez uses fantasy to reveal human
truths about the new beginnings and the value
of humanity. In the story, the
two most prominent characters are the fantastical Spider-woman
and the very
old man with enormous wings.

Spider-woman had a fall from
her
position in life and was in fact turned into a tarantula spider, with her
own head and
brain...