A. FIt
B. healthy
C. Shy
D. skinny
🧠 Explanation:
The antonym of “fat and flabby” is “skinny,” describing someone slim or lean. In the sentence, it contrasts the brother’s physique, highlighting physical differences. Antonyms clarify meaning by offering opposites, enhancing language precision. “Skinny” suggests a lack of excess body fat, fitting the context of physical description. Understanding antonyms aids effective communication, ensuring clarity in describing contrasts. This linguistic tool is vital in writing and speech, allowing nuanced expression of ideas, particularly in comparative contexts like describing siblings’ appearances, making language more vivid and relatable in everyday use.