Which BB illusion skill requires a full rotation at level 10?

The skill that requires a full rotation at level 10 is the one involving a complete 360-degree turn, which is described as a 1/1 rotation. This means the gymnast must complete one full turn of their body while maintaining the necessary form and control throughout the movement.

In the context of balance beam routines, achieving a full rotation is essential for fulfilling the level 10 requirements, which often emphasize more difficult skills as athletes progress and demonstrate their proficiency. A 1/1 rotation typically showcases a higher level of difficulty than lesser rotations, such as a 1/2 rotation or those that are more than one full turn, and it is crucial for scoring well in competitions.

The other options represent different amounts of rotation, which do not align with the level 10 requirements for a full rotation skill on the balance beam. Hence, while those skills may have their own significance, they do not meet the criteria specified for a full rotation at this level.