What unit in a car receives information from each wheel speed sensor?

The correct answer is the controller. In modern vehicles, the controller refers to the electronic control unit (ECU) that processes data from various sensors, including each wheel speed sensor. This information is essential for various systems in the car, such as anti-lock braking systems (ABS), traction control, and stability control.

The controller uses the data from the wheel speed sensors to determine the speed of each individual wheel, allowing it to make real-time adjustments to braking and power delivery to improve vehicle stability and safety. By continuously monitoring the speed of each wheel, the controller can intervene when it detects differences indicative of skidding or loss of traction.

The other options do not perform this role: the compressor primarily functions in the vehicle's air conditioning system, the governor is typically involved in regulating speed in different contexts (often in machinery rather than vehicles), and the accumulator is used for storing hydraulic fluid in the braking system rather than processing sensor data.