What adjustment should a jumper make for effective tracking in the sky?

Effective tracking in the sky is primarily influenced by how a skydiver positions their body. Dipping one shoulder into the wind creates a more aerodynamic profile that facilitates forward movement through the air. This adjustment helps generate horizontal lift, allowing the jumper to travel laterally in a controlled manner. By angling the body appropriately, a skydiver can reduce the deceleration effects of air resistance and achieve a more streamlined descent.

The other options may contribute to various aspects of freefall but do not specifically optimize tracking. Adjusting body position to create lift can lead to increased drag rather than effective tracking if not done correctly. Maintaining a flat body position can be useful for stability but might not allow for the necessary lateral movement. Pulling the arms closer to the body could enhance speed but may limit the ability to navigate effectively through the airflow. Thus, preparing the body with the correct shoulder dip is fundamental for successful tracking in freefall.