The famous line, “Uneasy lies the head that wears a crown,” originates from William Shakespeare’s Henry IV, Part 2. This idiom profoundly illustrates the immense burdens, anxieties, and responsibilities that accompany positions of great power, particularly those of a monarch or leader. The 'crown' in this context is a powerful symbol of authority and sovereignty. Therefore, the phrase directly refers to the person who 'Wears a crown' (Option B), meaning the individual who holds royal office or a similar high-ranking leadership role. Such individuals often face constant pressure, difficult decisions, and potential threats, leading to significant stress and lack of peace.
Options A, 'Wears a hat,' and C, 'Wears a wig,' are incorrect because hats and wigs are common accessories that do not carry the symbolic weight of power and responsibility associated with a crown. Option D is incorrect as Option B accurately captures the essence of the idiom.