What is the rating of the least severe hazard on a scale from 1 to 5?

The correct answer is that the rating of the least severe hazard on a scale from 1 to 5 is 1. In a typical hazard rating system, the lowest number indicates the least severe risk, while higher numbers correspond to increasing levels of hazard severity. Therefore, a rating of 1 signifies that the hazard is minimal, posing little to no risk, which illustrates the distinction clearly.

The choice that indicates 5 would typically represent the highest level of hazard severity, meaning it describes a situation that is most dangerous or has the highest potential for causing harm. Choosing a rating of 3 or 2 also represents moderate levels of risk, which do not fit the criteria for identifying the least severe hazard. Hence, the most accurate representation for the least severe hazard is indeed 1.