Correct Answer:
D. kind
The word "callous" describes someone who is insensitive, unfeeling, or shows a cruel disregard for others' feelings. Therefore, its direct antonym would be a word that expresses the opposite quality: compassion, empathy, or benevolence. "Kind" perfectly fits this description, meaning friendly, generous, and considerate.
- While "sensitive" implies awareness of feelings, "kind" more directly contrasts the lack of compassion in "callous."
- "Tender" can mean delicate or gentle, but "kind" is a stronger antonym for the emotional disposition.
- "Careless" is unrelated to the meaning of callous, referring to a lack of attention or concern for consequences, not feelings.
Understanding antonyms enhances vocabulary and comprehension.