What is a requirement for all group lifts in terms of the skaters’ movements?

The requirement for all group lifts that specifies all skaters must attempt to glide emphasizes the importance of maintaining fluidity and cohesion in synchro skating performances. Gliding during a lift is essential because it showcases the team's ability to maintain harmony and precision while executing the lift. This gliding movement not only demonstrates the strength and control of the skaters but also contributes to the overall aesthetic quality of the performance, as it creates seamless transitions and maintains the group’s integrity.

In contrast, the other options do not align with the established requirements for lifts in synchro skating. For instance, requiring all skaters to jump doesn’t reflect the essence of group lifts, which prioritize technique and synchronization over individual jumps. Similarly, stating that only the base skater should remain still undermines the collaborative nature of lifts where all participants must work together to ensure balance and stability. Lastly, while avoiding syncopation is important in maintaining rhythmic integrity in some movements, it is not a specific requirement for all group lifts. Therefore, the emphasis on gliding encapsulates the fundamental skills necessary for executing effective and cohesive group lifts in synchro skating.