What activity involves informing individuals of specific rights through signage?

The activity that involves informing individuals of specific rights through signage is correctly identified as posted notice. Posted notices are utilized in various contexts to communicate important information, such as rights, regulations, and procedures, to the public. This method is effective because it provides clear and visible guidelines that anyone in the area can readily access and understand.

In many legal and administrative contexts, these notices ensure compliance with laws and help educate the public about their rights and responsibilities. For example, in the context of law enforcement, posted notices may inform individuals about their rights during encounters with police or about specific legal obligations related to property or gatherings.

In contrast, the other options do not specifically relate to the act of informing individuals through signage. Federal package inspection involves the examination of mail or packages for compliance with laws, legal representation in courts focuses on the provision of defense or advocacy in judicial settings, and emergency management procedures pertain to planning and response strategies during crises—not directly communicating rights via posted signage. Thus, posted notice is the best fit for the activity described in the question.