When will the fire warning system components be activated?

The correct answer highlights that the fire warning system components are activated when temperatures rise above safe limits. This is crucial because fire detection systems in aircraft are designed to monitor specific parameters that indicate the presence of a fire or an increase in temperature that could lead to a fire hazard.

By focusing on temperature, the system can be responsive to actual fire threats rather than other operational conditions that do not necessarily correlate to fire risk. When temperatures exceed predetermined safe thresholds, alarms and other safety measures are triggered to alert crew members to take appropriate actions to ensure safety.

While the other options mention various aspects of aircraft operation, they do not provide a direct correlation to the activation of the fire warning system, which is fundamentally focused on detecting unsafe temperature levels. Thus, option A is the most accurate reflection of when the fire warning system is designed to activate.