When are you obligated to give first aid?

When you have already begun voluntarily giving first aid, you are obligated to continue providing assistance to the best of your ability until professional help arrives or the situation changes, such as if you become too exhausted to continue or if the scene becomes unsafe. This principle is based on the notion of "duty to act," which implies that once you take the initiative to help, you cannot abandon the victim in the middle of care without risking further harm.

In terms of context, the individual who starts administering first aid has likely established an informal agreement of care, which can be viewed as a responsibility to follow through on that initial assistance. This is particularly important because leaving a victim unattended after starting aid can lead to worsened conditions and could also leave the individual vulnerable to potential legal implications due to abandonment.

The other choices reflect various situations where first aid might be needed, but they do not impose a legal or ethical obligation in the same way that beginning first aid does. Therefore, the most accurate reason for an obligation to give first aid is when you have already started administering it.