There Will Come Soft Rains

Sara Teasdale -1884-1933 

(War Time)

There will come soft rains and the smell of the ground,

And swallows circling with their shimmering sound;

And frogs in the pools singing at night,

And wild plum trees in tremulous white,

Robins will wear their feathery fire

Whistling their whims on a low fence-wire;

And not one will know of the war, not one

Will care at last when it is done.

Not one would mind, neither bird nor tree

If mankind perished utterly;

And Spring herself, when she woke at dawn,

Would scarcely know that we were gone.

Taken from hittadium on Emmary of me bontando famous short poema 45000.

Which stanza shows metaphor?