Which of the following levels of toxicity features the phrase "Danger Poison" accompanied by a skull and crossbones?

The phrase "Danger Poison" along with the skull and crossbones is specifically used to denote compounds that are classified as highly toxic. This symbol clearly indicates that exposure to these substances poses significant health risks, and they can cause serious effects even in small amounts. The use of such cautionary labeling is aligned with regulatory standards that categorize materials based on their toxicity levels, ensuring proper handling and awareness regarding their dangers.

In this context, high toxicity indicates a serious level of hazard where immediate awareness and caution are paramount. The presence of both the warning phrase and the skull and crossbones symbol serves to alert individuals to the potential lethality of the substance, necessitating stringent safety measures to prevent exposure.