According to the definition, what describes a "confined space"?

A "confined space" is defined by specific characteristics that include restricted access and egress, meaning that entering and exiting the space are not straightforward and may pose risks to the individual. Additionally, such spaces often have conditions that can become life-threatening, including a lack of oxygen, the presence of harmful contaminants, or the potential for hazardous atmospheres. These factors make working in confined spaces significantly more dangerous compared to open work environments.

While the other options mention important safety considerations, they do not fully encapsulate the comprehensive definition of a confined space. For instance, the presence of harmful gases or vapors is a significant concern, but this aspect alone does not define a space as "confined." Similarly, highlighting mechanical hazards or limited room for tools addresses potential dangers but does not touch on the critical nature of access and overall environmental risk. Therefore, the comprehensive definition that includes restricted access, potential danger, and life-threatening conditions is what distinctly identifies a confined space.