Concept:An antonym is a word that is most nearly opposite in meaning to the underlined word.
Explanation:The correct word must give the opposite meaning of the underlined word and also fit the gap in the sentence.
Among the options, “brave” is the direct opposite of the underlined idea.
“Brave” means showing courage and not fear, so it contrasts clearly with the underlined word.
It also fits the sentence correctly without changing the meaning.
“Unfriendly” means hostile, not courageous.
“Carefree” means free from worry.
“Discerning” means having good judgment.
None of these options expresses the opposite meaning needed.
Therefore, “brave” is the most suitable answer.
Answer:C. brave