An emergency plan element that focuses on special planning needs generated by a bioterrorism attack is an example of a/an:

An emergency plan element that focuses on special planning needs generated by a bioterrorism attack is an example of threat/hazard/incident-specific annex.
Given that bioterrorism is a threat, or hazard which is very dangerous to a lot of people, and the Earth in general, such an annex has to be created so as to prevent this type of terrorism.