What should a driver do before starting their vehicle?

Before starting a vehicle, it is essential for a driver to lock the doors and adjust the seat. This practice is crucial for ensuring safety and comfort while driving. Locking the doors provides an added layer of security, reducing the risk of theft or unauthorized entry while the vehicle is in motion. Adjusting the seat allows the driver to reach the pedals comfortably and maintain proper control of the vehicle, which is vital for safe driving.

Other actions, such as opening the windows or turning on the radio, are not considered essential steps before starting the vehicle and can be distractions. Checking the weather, while helpful for planning a route, is not necessary immediately before starting the car compared to ensuring a safe and comfortable driving position. Hence, the correct choice emphasizes safety and readiness for the driving task ahead.