An example of a nonemergency call would be _____.

A nonemergency call refers to a situation that does not pose an immediate risk to life, property, or the environment and does not require urgent response from emergency services. Helping to string a halyard on a school flagpole fits this description perfectly. It is a task that can be planned and executed without the urgency typically associated with emergency situations.

In contrast, reporting a fire, asking for police assistance, and requesting an ambulance all involve urgent situations that require immediate attention from emergency responders. These scenarios pose risks and often demand a prompt response to ensure safety and mitigate potential harm. Therefore, option C stands out as the only example that does not fall into an emergency category, making it the correct answer.