Final answer:
a) Risk. Risk is the probability that an injurious event can happen, and it can be described as low, moderate, or high based on the number of times a hazard is present or injury results from it.
Step-by-step explanation:
Risk is the probability that an injurious event can happen, and it can best be described as low, moderate, or high based on the number of times that a particular hazard is present or the number of times injury results from the hazard.
For example, let's say we have two factories. Factory A has a hazard present 5 times and results in injury 3 times. Factory B has the same hazard present 10 times but results in injury 8 times. Factory A would be classified as having a low risk because the hazard is present only 5 times and results in injury 3 times, while Factory B would be classified as having a moderate risk because the hazard is present 10 times and results in injury 8 times.
Thus, the probability of an injurious event happening determines the level of risk.