Which of the following is crucial for maintaining control on slopes?

Maintaining control on slopes is fundamentally about ensuring that the load is managed correctly to prevent any tipping or loss of balance. Proper orientation of the load refers to positioning it in such a way that the center of gravity is stable and aligned with the equipment being used. When a load is correctly oriented, it minimizes the risk of the machine tipping over or sliding down the slope, which is a common hazard when working on inclines.

In this context, factors like using a seatbelt, which is important for safety during operation, are not directly related to maintaining control of the equipment on a slope. Similarly, speeding up can exacerbate control issues, increase the risk of accidents, and hinder one's ability to respond effectively to changing conditions. Operating in reverse can sometimes be necessary, but it does not inherently contribute to stability on slopes without proper load orientation. Thus, the key to maintaining control when navigating a slope lies in how the load is positioned and balanced relative to the machine.