Risk trigger is a condition or event that will cause a risk to take place. In this process, you would establish roles and responsibilities for monitoring risk factors.
Explanation:
When the possibility of the occurrence of risk is catalyzed by some event or condition that abruptly arises, the event or the condition is called the 'risk trigger'. Such triggers need to be ceased from arising in order to eliminate possible failure risks in the project.
The most efficient way to do that is through observing the risk factors involved in the process and dedicating responsibilities to control these factors so that they don't get converted into risk triggers.