Concept:An antonym is a word that means the opposite of another word.
Here, we need the opposite of “timidity.”
“Timidity” means shyness, fear, or a lack of confidence.
Explanation:The word “timidity” describes someone who is hesitant, nervous, or easily frightened.
So its opposite should describe someone who is confident, fearless, or self-assured.
Look at the options:
A. Hostility means unfriendliness or aggression — not the opposite of shyness.
B. Sincerity means honesty or genuineness — this is unrelated to timidity.
C. Boldness means courage, confidence, and daring — this is the direct opposite of being timid.
D. Carelessness means lack of attention or negligence — this is not related to timidity.
Therefore, the word that correctly opposes “timidity” is “boldness.”
Answer:C. boldness