Each motor controller shall be capable of ______________ the motor it controls.

The selected answer highlights the fundamental functions of a motor controller, which must be capable of starting and stopping the motor it controls. This ability is crucial as it allows for the safe and efficient operation of motors in various applications.

Starting a motor involves providing the necessary electrical energy to initiate motion, allowing it to reach its operational speed. Stopping a motor is equally important as it ensures that the motor ceases operation when needed, either for safety reasons, maintenance, or operational changes. This starting and stopping function is essential for controlling the motor's performance and ensuring it operates within its designed specifications.

While maintaining current, automatically resetting, and monitoring temperature are important features in specific contexts, they do not encapsulate the primary operational duties of a motor controller. Maintaining current is more about regulating the flow of electricity, automatic resetting pertains to fault recovery, and temperature monitoring deals with preventing overheating. However, the actual control over the motor's operation hinges on the controller's ability to effectively start or stop the motor. Such control is fundamental to the functionality of motor controllers across various industrial and residential applications.