Which fault occurs when a player steps over the line while serving?

The correct answer is a foot fault, which occurs when a player steps over the service line or touches it with their foot during a serve. In volleyball, the server is required to remain behind the service line until the ball is struck. If the server steps on or over this line before making contact with the ball, a foot fault is called, resulting in the loss of serve or a point for the opposing team. This rule is in place to ensure fairness and proper gameplay by preventing players from gaining an unfair advantage through their positioning.

Net faults, double touches, and rotation errors pertain to different infractions during a match. A net fault involves a player touching the net during play, a double touch refers to a player contacting the ball twice in succession (which usually happens in an attempt to set the ball), and a rotation error occurs when players fail to rotate properly in accordance with the rules after a serve. Each of these faults is distinct and pertains to specific rules and scenarios within the game, making foot fault the correct choice in the context of a server stepping over the line.