Which statement about the engine fuel feed line shutoff valves is correct?

The statement regarding the firewall shutoff valve being responsible for stopping fuel flow and being activated by the firewall shutoff handle is correct. This valve plays a crucial role in the fuel system by providing a means to isolate fuel flow, particularly during emergencies or maintenance.

When the firewall shutoff handle is pulled, it physically operates the firewall shutoff valve, effectively closing it and thereby halting the fuel supply to the engine. This is an essential safety feature that helps prevent fuel leaks or fires during maintenance procedures or in emergency scenarios where fuel must be quickly shut off.

In contrast, the other options do not accurately represent the function of the firewall shutoff valve or confuse its role with that of other components in the fuel system, such as the maintenance shutoff valve. Understanding the specific roles of each valve is vital for maintenance and ensuring the aircraft operates safely.