What important theme of realism is reflected in these lines from “Song of Myself” by Walt Whitman?

And as to you Corpse I think you are good manure, but that does not offend me, I smell the
white roses sweet-scented and growing,
I reach to the leafy lips, I reach to the polish'd breasts of melons.

A.
the beauty of nature and human life
B.
the beautiful and harsh realities of life
C.
the harsh realities of a cruel world
D.
the mystery of the food chain in nature