Final answer:
The narrator of 'The Tell-Tale Heart' can be inferred to be unwell and uneasy based on their nervous and sensitive demeanor.
Step-by-step explanation:
The narrator of 'The Tell-Tale Heart' can be inferred to be unwell and uneasy based on the passages provided. The text describes the narrator as having a nervous and sensitive demeanor, as evidenced by their restless behavior, pale countenance, and trembling voice. These traits suggest that the narrator is experiencing mental distress or anxiety.