What is required in the execution of features for them to receive credit?

To receive credit for executed features in synchro skating, it is essential that all features are both correctly synchronized among team members and visually held. This means that during the execution of the feature, skaters must maintain a harmonious and coordinated performance that reflects the unity of the group. The visual hold adds to the aesthetic quality and technical execution of the feature, making it more impressive and ensuring it meets the standards set by governing bodies in synchro skating.

By requiring synchronization, the judging criteria emphasize the importance of teamwork, which is a fundamental aspect of synchro skating. Without this synchronized execution, the feature may not represent the collective effort of the team, which is key to scoring well. Furthermore, the visual hold is important as it demonstrates control and the ability to maintain positions, contributing to the overall impact of the performance.

The other options highlight varying criteria that do not encompass the full requirements for feature credit in synchro skating. The focus on only difficulty or lack of need for visual holds wouldn't align with the core principles of the discipline, which place significant importance on both execution quality and the visual coherence of the team's performance.