💡 Detailed Explanation
The correct answer is 「柔軟」 (jūnan), which means 'flexible', 'pliant', or 'adaptable' (e.g., flexible thinking, flexible response). 「柔和」 (jūwa) means 'mild/gentle' (for personality/facial expression). 「軟弱」 (nanjaku) means 'weak/feeble'. 「緩和」 (kanwa) means 'relaxation/easing (of regulations/tension)'.