Which of the following is considered a physical hazard?

Engulfment is classified as a physical hazard because it involves a situation where individuals can become buried or submerged in a material, which poses immediate physical danger to life and safety. This can occur in various scenarios, such as being caught in an avalanche of sand, grain, water, or other substances, resulting in suffocation or crushing.

Physical hazards are typically characterized by their ability to cause harm through direct physical means, such as crushing, slipping, being struck by objects, or becoming trapped. Engulfment directly impacts a person's ability to move or escape, making it a significant concern in hazardous materials operations and emergency responses.

In contrast, toxic environments and vapors are related to chemical hazards due to their potential to cause harm through exposure or inhalation. Corrosive exposure also falls under a chemical hazard, as it pertains to substances that can cause damage to body tissues or materials through chemical reactions. Thus, engulfment distinctly represents a physical hazard due to its immediate threat to safety through physical obstruction or immersion.