Which of the following is a sign of a drowning person?

A drowning person may exhibit several specific signs that indicate they are in distress and unable to save themselves. One of the hallmark signs is the inability to call for help, which typically involves the individual struggling and potentially being submerged, often floating face down in the water or showing little to no movement toward safety. This behavior indicates a critical situation where the person is distressed and unable to respond effectively, contrasting sharply with typical swimming or self-rescue actions.

The other scenarios mentioned do not accurately represent signs of drowning. For instance, swimming vigorously or making splashes may seem like active self-rescue attempts but can often be misleading, as they might not reflect genuine progress towards safety. Also, someone calling for help while floating face up suggests they are in a safer position and able to communicate for assistance, which does not align with the distress indicators of a drowning victim. Understanding these signs helps in identifying potential drowning victims even in situations where they might not be immediately visible or vocal about their struggle.