What hand motion indicates lowering the load?

The correct choice indicates that the hand motion of pointing the index finger towards the ground and making a circling motion is a recognized signal for lowering a load. This gesture clearly communicates to all personnel involved in the operation that the load should go down, ensuring coordination and safety during lifting tasks. The circling motion reinforces the intention and provides a visual cue that can be easily noticed by those observing.

Contextually, other options do not accurately convey the direction of the load. Pointing the index finger towards the sky typically signifies to raise the load, which is the opposite of lowering it. Extending both arms downward may suggest lowering as well, but it is less specific and lacks the standardization of the circling motion that provides additional clarity. Raising both hands and waving does not convey any information about load movement and may confuse bystanders rather than communicate the intention clearly.