What does the ignition switch lock provide for the vehicle?

The ignition switch lock is a crucial security feature of a vehicle. Its primary function is to prevent unauthorized access and use of the vehicle by locking the ignition system when the key is not inserted. This helps deter theft, as the car cannot be started without the correct key or key fob, providing peace of mind to the owner.

While steering assistance is an important function in some vehicles, it is not related to the ignition switch lock. Enhancing fuel efficiency pertains to engine performance and vehicle operation, which is also unrelated. Guidance on traffic laws does not apply to the ignition switch lock and instead refers to driving regulations a driver is expected to follow. Hence, the primary role of providing security for the vehicle stands out as the correct answer.