The answer is c
Explanation:
In medieval England, society was traditionally divided into three "estates" (roughly equivalent to social classes). The "First Estate" was the Church (clergy). The "Second Estate" was the Nobility, and the third estate, the largest, was made up of commoners.
The work describes Thoreau's thoughts over the course of a year spent immersed in the natural world is the answer.
You could also use, "Also", or nonetheless.
Some say it was his approach to defend his stance on Reconstruction. It was biblical and focused on Gods will and plans, and how people dont understand them. It was a very sad speech. good luck hope this helps!