Final answer:
Tag lines used for moving suspended loads must be strong and sturdy to ensure safety and control.
Step-by-step explanation:
When moving a suspended load, tag lines should be strong and sturdy. This is important because tag lines are used to control the movement and direction of the load, and they need to be able to withstand the weight and forces associated with lifting and moving heavy objects. A strong and sturdy tag line can help prevent accidents and ensure a safe and controlled lifting process.