When it comes to labeling a robot, what is emphasized?

The correct choice emphasizes that the team number must be visible on at least two sides of the robot. This requirement is crucial for several reasons: it ensures that judges, referees, and spectators can easily identify teams during matches from different angles, especially during fast-paced gameplay. Visibility from multiple sides enhances transparency and organization in competitions, as officials need to track performance accurately. Additionally, having the team number displayed on at least two sides aids in maintaining safety and proper coordination in the robot competition environment, where multiple robots are operating simultaneously.

The other options, while potentially related to the aesthetics or presentation of the team number, do not align with the essential functional requirement outlined in the competition rules. Decorated numbers might be visually appealing but lack the practicality needed for quick recognition. Size and color are also important, but the foremost rule focuses on visibility from varying perspectives to support effective identification.