Final answer:
Devices or materials that release toxic chemicals, infectious agents, or radioactive emissions can cause severe harm or death.
Step-by-step explanation:
Any device or material that causes death or serious bodily harm through the release of toxins, infectious biological substances, or radiation is considered highly dangerous. In the case of chemical agents, such as poisonous chemicals or toxins produced by organisms.
Biologically produced toxins include botulinum toxin, ricin, and saxitoxin, all of which have been used or considered for use in chemical warfare. Bioterrorism involves the deliberate release of biological agents like viruses or bacteria that can cause widespread disease and panic.
Lastly, the exposure to radioisotopes can cause radiation sickness or death, given that radioactive emissions can ionize molecules and damage living cells, resulting in critical cellular malfunctions.