Identifying Rhetorical Strategy in Public Health Speech

Read the following excerpt from a speech on public health:

"In our fight against the epidemic, we have witnessed not only the resilience of our healthcare system but also the undeniable unity that our struggles have fostered within our communities. It is this unity that transforms fear into action, turning ordinary citizens into heroes in their own right. We must embrace this collective strength, for it is only through our shared determination that we can conquer the challenges ahead."

Which rhetorical strategy does the speaker primarily employ to persuade the audience?