Which of the following is an example of automatic control?

Under FCC Part 97 rules, 'automatic control' means the use of devices and procedures for control of a station when a control operator is not present at a control point. A repeater is a classic example of this, as it automatically receives and retransmits signals without requiring a human operator to manually trigger each transmission. While using a computer to send Morse code (CW) or automatically transmit your station identification involves automated functions, it does not constitute 'automatic control' of the station itself. In those cases, a control operator is still present at the control point initiating the overall transmission. Controlling a station over the internet is an example of 'remote control', not automatic control.