Intentional release of toxic biological agents to harm citizens is known as?

The correct choice is bio-terrorism because it specifically refers to the intentional dissemination of biological agents, such as bacteria, viruses, or toxins, with the aim of causing harm, fear, or disruption among the civilian population. This form of terrorism leverages the potential for biological weapons to inflict widespread illness or panic, making it a significant public safety concern.

Bio-terrorism focuses on the use of pathogens or biotoxins that can be easily spread, representing a serious threat to public health and safety. Recognizing this as a distinct category of terrorism is crucial for emergency services and public safety organizations, as it dictates the type of response and prevention measures that need to be in place.

In contrast, state terrorism generally involves government actions intended to intimidate or coerce a population, while eco-terrorism refers to acts taken to protect the environment typically by radical groups. Nuclear terrorism involves the use of nuclear materials or weapons. Each of these terms relates to different motives, methods, and consequences, which is why bio-terrorism is the best fit for the scenario described.