Is a highly toxic material always very hazardous?

The answer is that a highly toxic material can indeed pose a low risk if handled properly. The classification of a substance as highly toxic indicates that it has the potential to cause severe harm, but risk is fundamentally about the combination of toxicity and exposure. When trained personnel use appropriate safety protocols, such as wearing personal protective equipment, implementing ventilation procedures, and following proper handling techniques, the risks associated with the material can be significantly mitigated. This emphasizes the importance of proper training and safety measures in reducing risks even with dangerous substances.

While the other options may touch on aspects of hazards related to concentration or environmental factors, they do not accurately convey the importance of safe handling practices in managing risks associated with highly toxic materials. Therefore, the recognition that proper handling can dramatically lower the risk is central to understanding how toxicity and hazard relate in practical scenarios.