Karl listed the steps involved when information is sent from transmitters to receivers. 1 - A signal is produced. 2 - Radio waves are modulated and amplified. 3 - An antenna sends modulated waves through the air. 4 - An antenna captures the modulated waves. 5 - A signal is heard, seen, or used. Which describes the missing step? After Step 5, radio waves are amplified and demodulated. Before Step 5, radio waves are amplified and demodulated. After Step 3, radio waves are amplified and demodulated. Before Step 3, radio waves are amplified and demodulated.