Which type of pi rotation requires continuous arm movement without a fixed position?

The Continuous Arm Movement Feature is characterized by the need for skaters to maintain fluid and ongoing movement of their arms throughout the rotation. This aspect is essential to create a seamless visual effect and to embody the dynamic nature of synchro skating.

The concept of continuous arm movement implies that the arms do not remain static or held in a fixed position at any point during the rotation, allowing for a graceful and elegant transition that enhances the overall performance. It emphasizes coordination, timing, and teamwork among the skaters as they execute their routine.

In contrast, the other types of features mentioned have different requirements. For instance, the Angled Feature may involve specific placements or angles that skaters hold, and the Collapsing Feature typically refers to a change in formation that does not necessitate the continuous movement of arms. Meanwhile, the Whip Feature may involve a sharp, quick movement or action that does not align with the continuous motion requirement necessary for this specific question. Therefore, the choice emphasizing continuous arm movement correctly identifies the defining characteristic of the feature being addressed.