Which of the following is the BEST definition of a Risk?

Something that will not happen has no uncertainty and therefore presents nothing to manage or mitigate.

Something that will definitely happen is a certainty or a known constraint, not a risk - risk by definition requires uncertainty about whether the event will occur.

Something that has already occurred is an incident or issue, which falls under incident or problem management, not risk management.

In risk management frameworks including ITIL, a risk is specifically an uncertain event or condition - something that might happen. Because the outcome is not guaranteed, risk management focuses on assessing likelihood and impact, distinguishing risks from known issues or constraints.