What can be an indicator that an unresponsive person is in the water?

In water rescue scenarios, recognizing the signs of an unresponsive person is crucial for timely intervention. The correct answer highlights that water movement may create the appearance of motion, which can be misleading.

When an unresponsive individual is submerged, their body can cause disturbances in the water that mimic movement. This can be due to currents, waves, or even minor shifts caused by the person's position in the water. Lifeguards and rescuers must be vigilant because these indicators can prevent someone from recognizing that a person is in distress and needs immediate assistance.

The other options suggest that the individual is capable of responding or swimming to safety, which would not indicate unresponsiveness. Making splashes typically implies some level of movement or effort to stay afloat, and shouting for help obviously indicates that a person is conscious and aware of their situation. Therefore, the subtle disturbances in water caused by an unresponsive person can easily be misunderstood without proper training and awareness in lifeguarding.