Final answer:
The correct device used by a car thief to remove a car lock and start the engine with a screwdriver is an ignition extractor.
Step-by-step explanation:
The device used by a car thief that attaches to and removes the lock is called an ignition extractor. A slim jim is typically used to slide down the car door to manipulate the lock mechanism from the inside. A lock pick is a device used for unlocking a lock by manipulating the components of the lock device without the original key. Lastly, jiggler keys are tension tools used to open the lock by mimicking the correct key. Given the description of attaching a device to the lock that subsequently removes it, an ignition extractor is the tool that fits this functionality best. It allows the thief to start the car with an instrument like a screwdriver.