What device receives information and makes decisions and then operates a motor based on the data?

• A. Sensor
• B. Power supply
• C. Controller
• D. Actuator

Answer: (C)

The controller is the device that receives data, makes decisions, and then drives the motor. In a robot, sensors provide measurements about the world or the system's state, the controller processes that information using its control logic (like a PID or other algorithm), and it outputs commands to the motor or its driver to produce the desired motion. The motor (actuator) carries out the physical action, while the power supply simply provides the energy needed for all components to operate. So the thing that both interprets the data and decides what the motor should do is the controller.