What unique feature is present in the Fourth Intermediate Rear Position?

In Scottish Highland Dance, the Fourth Intermediate Rear Position has specific characteristics that distinguish it from other dance positions. The choice indicating that the Working Foot (WF) is placed only on the ball is accurate because this position emphasizes balance and poise. When the WF is on the ball, it allows the dancer to maintain a sense of lightness and readiness to execute movements efficiently. This placement is crucial as it prepares the dancer for quick transitions and movements that are central to Highland dance techniques, enhancing agility and stability.

The other options describe elements that do not align with the unique aspects of this position, focusing instead on different aspects of foot placement and posture that are characteristic of other dance positions. Thus, understanding the importance of having the WF on the ball is essential for mastering the Fourth Intermediate Rear Position.