Final answer:
Shutting off power to protect emergency responders is an action taken as part of precontact control in hazard control.
Step-by-step explanation:
Shutting off power to protect emergency responders is an action taken as part of precontact control in hazard control. Precontact control refers to the measures taken before contact with a hazardous substance or situation to prevent or minimize harm. In the context of emergency response, shutting off power can be done to eliminate electrical hazards that may pose a risk to responders.