Dance to someone's tune means to obey or be controlled by someone else. The correct answer is this meaning because the expression is used figuratively, not only by its literal words.

Examples:

• The weak official had to dance to someone's tune.
• In an HSC essay, Dance to someone's tune can express this meaning: to obey or be controlled by someone else.
• When this expression appears in a passage, connect Dance to someone's tune with the idea of to obey or be controlled by someone else.