What is an item that disperses a biological agent called?

The term used for an item that disperses a biological agent is known as a biological weapon. This type of weapon involves the use of pathogens or organisms that can cause diseases in humans, animals, or plants. Biological weapons can be designed to spread infectious diseases or toxins that lead to illness or death, thus impacting public health and safety.

In contrast, the other options refer to different categories of weapons. A chemical weapon utilizes toxic substances to inflict harm or death, while a nuclear weapon is one that derives its destructive force from nuclear reactions. A biological agent itself refers to the pathogen or organism, not the delivery mechanism. Therefore, identifying the correct term as a biological weapon clearly aligns with the definition of an item that disperses a biological agent.