Asphyxiation on the job site is attributed to:

• A. Lack of ventilation
• B. Toxic gas buildup
• C. All of the above
• D. Industrial accident

Answer: (C)

Asphyxiation happens when the air isn’t safe to breathe—either because there isn’t enough oxygen or because toxic gases are present. If a space isn’t well ventilated, oxygen levels can drop quickly, creating a life-threatening atmosphere. At the same time, the buildup of toxic gases can displace oxygen or prevent your body from using it effectively, leading to suffocation. An industrial accident can trigger either situation by releasing gases or sealing off an area, so both lack of ventilation and toxic gas buildup are real pathways to asphyxiation. That’s why all of the above is the best answer.