In "The Story of an Hour," how is the imagery in the fifth paragraph used to develop mood?

The fifth paragraph comes after Mrs. Mallard has heard the
dreadfully upsetting news of her husband's death, and when she has ensconced herself in
her bedroom to grieve by herself. Interestingly, we are told that the "storm of grief"
that first possessed her when she first heard the news had passed, and it is clear that
what she sees as she looks out of the window and what she hears from her bedroom are
used to develop a very different mood that will come to characterise Mrs. Mallard's
emotions. Note what this paragraph says and the imagery it
contains:

She
could see in the open square before her house the tops of trees that were all aquiver
with the new spring life. The delicious breath of rain was in the air. In the street
below a peddler was crying his wares. The notes of a distant song which some one was
singing reached her faintly, and countless sparrows were twittering in the
eaves.

Of course, the imagery
of the trees being "all aquiver with the new spring life" finds its parallel in the
state of freedom that she is able to enjoy. She, now that her husband has been taken for
her, experiences "spring life." Likewise, the "delicious breath of rain" shows her
sensuous enjoyment of nature, as does the "twittering" of the sparrows. In short the
imagery employed in this paragraph shows us Mrs. Mallard's appreciation and enjoyment of
nature and how much she has to look forward to. As the story itself is set in Spring,
which is a time of re-birth and a new beginning, so Mrs. Mallard, so she believes, has
been given a new beginning and the gift of freedom. Nature and the internal thoghts and
feelings of Mrs. Mallard connect in this sense.