Which of the following is considered a non-obstruction?

Out of bounds stakes are classified as a non-obstruction because they represent a boundary defining the limits of the playing area on a golf course. When a ball goes out of bounds, it is no longer in play, and players must bring their ball back into play from the designated drop area, often taking a penalty stroke in the process.

In contrast, temporary water hazards, movable obstructions, and sand traps either affect the play of the ball in some way or can be manipulated. Temporary water hazards can impede the play and offer specific relief options if a player's ball lands in them. Movable obstructions can be removed without penalty to allow for a clear shot, while sand traps are designed as hazards that players must navigate strategically during play. This distinction clarifies why out of bounds stakes are treated differently and categorized as non-obstructions.