Before starting to drive, what action needs to be taken by the driver before moving the automatic transmission selector?

1. Release the clutch pedal, to connect between the engine and the gear box.
2. Step on the accelerator, to start driving immediately.
3. Release the parking brake, to release the gearbox lock.
4. Correct answer: Apply the foot-brake, to prevent the vehicle from moving.

WhyBefore moving the selector of an automatic, press the brake so the car does not move.