Final answer:
Nurses and community officials stocking supplies for shelters fit into the Preparedness phase of disaster management, which is focused on readying services and capabilities before a disaster occurs.
Step-by-step explanation:
The activities described are representative of the Preparedness phase of a disaster continuum. Preparedness involves actions that are taken to build the necessary capabilities to respond effectively to disasters. By ensuring that churches and schools have the necessary supplies to provide shelter, nurses and community officials are preparing to protect the health and safety of the public during events such as natural or manmade disasters. These actions are critical for establishing readiness and ensuring quick, organized, and efficient relief efforts when a disaster does strike.