Answer:
Isolation—this passage illustrates how sad Walton feels about having no one to share his success or failure with.
The section entitled “Solitude” in Walden structure best describe that "Thoreau describes a sequence of events he enjoys at night, and then compares himself to others who do not understand his pleasure in being alone in nature." Solitude for Thoreau it approaches a mystical state but in reality, it is more of a state of mind than an actual physical circumstance. The ones that occupied him in the first chapter and the worldly affairs faded.
<span>
</span>
If two or more ppl answer. You pick one
In this case it would be an adverb.
Hope this helps !!!