According to OSHA's adoption of the GHS's system, which number indicates the slightest risk?

The correct answer is based on the way the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) categorizes hazards. In this system, the numerical classification typically runs from 1 to 4, with 1 representing the highest level of risk and 4 representing the lowest. Therefore, a number of 4 indicates the slightest risk associated with a chemical or hazard, suggesting that it is less dangerous and poses fewer threats compared to those classified with lower numbers.

This numerical classification is crucial for effective communication regarding the potential dangers of hazardous materials in various environments, including workplaces. Understanding this ranking helps ensure proper safety measures and training are implemented according to the level of risk present.