Final answer:
The local government is responsible for declaring, conducting, and terminating Level 1 emergencies.
Step-by-step explanation:
The group that takes the lead role in declaring, conducting, or terminating Level 1 emergencies is the local government. In the United States, for example, this would typically be the mayor or city council. They have the authority to declare a Level 1 emergency, initiate emergency response plans, and determine when the emergency is resolved and the response can be terminated.