Explanation
The opposite of "adapt" is "unfit" because "adapt" means to adjust or become suitable, while "unfit" means not suitable or unable to adjust. The other options, "applaud" and "approve," are unrelated in meaning.
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The opposite of "adapt" is "unfit" because "adapt" means to adjust or become suitable, while "unfit" means not suitable or unable to adjust. The other options, "applaud" and "approve," are unrelated in meaning.