How does the ABS system prevent the wheels from locking up?

The Anti-lock Braking System (ABS) prevents the wheels from locking up during braking by modulating the brake pressure on all four wheels. This means that when the system detects that a wheel is about to lock, it reduces the brake pressure to that wheel temporarily. This modulation happens rapidly and continuously, allowing the driver to maintain steering control and avoid skidding. By adjusting the pressure, ABS ensures that the tires can continue to grip the road surface effectively, leading to better stopping performance and enhanced vehicle control during emergency braking situations.

This understanding highlights the critical role of pressure modulation in the ABS function, emphasizing why this answer is the most accurate choice.