What does the hydraulic system typically include?

The hydraulic system in a vehicle's braking system is crucial for transferring force from the driver's foot on the brake pedal to the braking components at the wheels. The correct answer highlights the main components that make up this system: the master cylinder, hydraulic lines, calipers, and cylinders.

The master cylinder is responsible for converting the mechanical force from the brake pedal into hydraulic pressure. This pressure is then transmitted through the hydraulic lines, which ensure that the force is evenly distributed to the brake components at each wheel. The calipers and wheel cylinders are essential for applying that hydraulic pressure to the brake pads or shoes, which then create the friction needed to slow down or stop the vehicle.

This combination of components ensures efficient and responsive braking performance, making it vital for vehicle safety. The other options do not encompass the entirety of the hydraulic system; while they may include related parts or functions, they do not collectively describe the hydraulic system as comprehensively as this answer does.