Events such as Active Shooter, imminent threat from civil disturbance, etc. may call for activation of this emergency response:

The correct response is activation of a lockdown during events such as an active shooter situation or imminent threats from civil disturbances. A lockdown is designed to secure environments and protect people from harm by limiting access to the area and ensuring individuals are safely inside locked rooms or away from danger.

Implementing a lockdown helps to contain potential threats and provides law enforcement and emergency responders time to assess the situation and manage the incident effectively. This procedure involves securing doors, turning off lights, and maintaining silence, fostering a safe environment until authorities give the all-clear signal.

The other options have distinct purposes but do not adequately serve the immediate need for personal safety during an active shooter or similar threats. For instance, while 'shelter in place' is intended for specific hazards like chemical releases, it does not provide the same level of security in a violent situation. 'Continuation of government' pertains to maintaining operational functionality of government agencies, not personal safety in emergencies. 'Stand down' implies that a previous response is no longer necessary, which is the opposite of what is needed during an active shooter event when immediate action to secure safety is critical.