I do not know the full context of your question but I will give some possible leads. "T<span>hat man is intimidating" if the man appears mean to others or suspicious to the aliens. "that man appears foolish and stupid to others" if he seems indifferent or unaware, "that man is brutal and unforgiving" if the alien saw brutality among men, "that man is dignified, if insignificant" if man appears autonomous.</span>
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Answer:
The correct answer is option A. Allusion
Explanation:
An allusion is used in rhetoric to refer to something indirectly, that is, by referring to it.
In this case the title "An Idle Fellow" refers to inactivity, who has been the faithful companion during the author's life.
He even describes himself as a person who does not like to do anything, and his "idle fellow" is said inactivity.