Final answer:
To control a suspended load being moved, a person on the ground should use hand signals or radios to communicate with the operator of the machinery.
Step-by-step explanation:
To control a suspended load being moved, a person on the ground should use hand signals or radios. Yelling loudly may not be effective as it can be difficult for the person operating the machinery to hear. Hand signals and radios provide clear communication and allow for precise control of the load movement. For example, different hand signals can indicate when to stop, start, raise, or lower the load.