What is the main requirement for a Rotating Element?

The main requirement for a Rotating Element in synchro skating is to meet the highest level of execution, which corresponds to the level "LB" (Level Base or Level of Bounding). This requirement ensures that the element meets the expected standards for complexity and difficulty in competitive performances.

In synchro skating, elements are evaluated not just on their execution but also on their technical quality and the precision with which they are performed. The highest call level signifies that the executing team has performed the elements with a high degree of artistry, synchronization, and technical accuracy. This focus on meeting strict call levels is critical for scoring effectively during competitions, as it reflects the skills and training of the skaters involved.

The other options showcase different aspects of rotation or performance but do not encapsulate the overarching requirement that pertains to achieving the highest judges' call on each element performed. Thus, the emphasis on executing to the highest standards is central to understanding what qualifies a performing element as rotational.