How does the progress of the last paragraph of “where i lived and what i lived for” communicate the main idea of walden?

a) just as the paragraph moves from images of the water to those of the earth, thoreau moves from emotional subjects to more practical subjects.

b) thoreau moves from gazing at the water to burrowing into the earth, just as the excerpt shows a progress from observation to contemplation.

c) the progress of the paragraph reinforces the increasing comfort thoreau felt in the natural world.

d) just as the paragraph moves from gazing at water to digging in the earth, the excerpt moves from minimal knowledge of nature to more in-depth knowledge.