Final answer:
The statement is true. When a braking system is worn, it can result in an early and unpredictable lock up of an individual wheel while braking.
Step-by-step explanation:
The statement that Warn braking system parts can result in an early and unpredictable lock up of an individual wheel while braking is true.
When a braking system is warn, it can lead to uneven braking force distribution, causing one wheel to lock up before the others. This can happen when the brake pads or shoes are worn out and not providing sufficient friction on the rotor or drum.
As a result, the locked wheel loses traction and may skid, leading to an unstable and unsafe braking situation.